Unit 8 Let's Communicate if 引导的条件状语从句-2025-2026学年八年级英语暑假语法培优训练（人教版2024）

2025学年新八年级英语暑假语法培优训练（人教版2024） Unit 8 Let's Communicate! if 引导的条件状语从句 语法讲义 1、 定义 if 引导的条件状语从句，是表示主句动作发生所需条件的从句。在 Unit 8 中，主 要用于讨论在不同沟通情境下可能出现的情况以及相应的结果，通过这种语法结构， 能清晰地表达条件与结果之间的逻辑关系。 二、构成形式 1.基本结构：if 引导的条件状语从句由 “ if + 从句，主句” 构成。例如：If you want to solve the problem, a face-to-face talk usually works the best.（如果你想解 决问题，面对面交谈通常是最好的方式。）其中，“ If you want to solve the problem” 是条件状语从句，“a face-to-face talk usually works the best” 是主句 。 2. 时态搭配（主将从现原则） ：在 if 引导的条件状语从句中，当主句描述将来 的情况时，主句用一般将来时（will + 动词原形），从句用一般现在时 表示将来。例如：If it doesn't rain tomorrow, we will go for a picnic.（如 果明天不下雨，我们就去野餐。）“If it doesn't rain tomorrow” 是从句， 用一般现在时；“we will go for a picnic” 是主句，用一般将来时 。 3.特殊情况：当主句是祈使句或含有情态动词（如 can, may, must 等）时，从句仍然 用一般现在时。例如：If you need help, call me.（如果你需要帮助，打 电话给我。）主句是祈使句，从句用一般现在时；If you can finish your work early today, you can go home.（如果你今天能早点完成工作，你就 可以回家。）主句含有情态动词 can ，从句用一般现在时 。 三、注意事项 1.if 从句位置：if 引导的条件状语从句可以放在主句前，也可以放在主句后。当 if 从 句在主句前时，从句后要用逗号与主句隔开；当 if 从句在主句后时，不 用逗号隔开。例如：If you stay calm and say sorry, it will help. = It will help if you stay calm and say sorry.（如果你保持冷静并道歉，这会有帮助。） 2.与其他引导词引导的状语从句区别：if 引导的条件状语从句与 when 引导的 时间状语从句在用法上有相似之处，但 when 强调时间点或时间段，而 if 强调条件。例如：When I grow up, I will be a teacher.（当我长大后， 我会成为一名教师 。 ）强调时间 ；If I study hard, I will pass the exam. （如果我努力学习，我会通过考试。）强调条件 。 语法专练 一、单项选择 1．—I’m thinking about going to the beach tomorrow. —That’s a good idea. You’ll have fun ______ it doesn’t rain. A．though B．until C．if D．since 2．You will be good at what you are learning ________ you practice hard. A．if B．but C．unless D．or 3．—What ________ if the students ________ an outdoor activity tomorrow? —They will prepare food and drinks for it. A．will happen; have B．happened; have C．will happen; will have D．happen; will have 4．________ you eat too many sweet things, you may get tooth problems. Remember: You are what you eat. A．If B．Although C．So D．Before 5．We can make a snowman ________ it snows. A．before B．if C．until 6．We can have a wonderful future ______ we work hard. A．although B．because C．if D．so 7．What ________ you do if you have a long holiday? A．will B．do C．are 8．If the old lady ________ have a seat, I ________ her my seat. A．doesn’t; give B．doesn’t; will give C．won’t; will give 9．If it ________ tommorow, I ________ football with my friends . A．rains; won’t play B．rains; don’t play C．will rain; won’t play D．rain; will play 10．We ________ fishing if it ________ rain tomorrow. A．are; doesn’t B．will go; will C．will go; doesn’t D．go; won’t 11．You will feel sleepy ________ you get up early in the morning. A．because B．if C．before D．after 12．Please raise your hand ________ you agree with us. A．unless B．if C．although D．before 13．Our class are going to have a picnic tomorrow. If you don’t go, ________. A．so do I B．neither do I C．so will I D．neither will I 14．—Tom, ________ you are free, let’s go to the shop and buy a gift for your mother. —Ok, dad. Tomorrow is Mother’s Day. I almost forgot it. A．until B．if C．before D．because 15．If we ________ a diary in English, our written English will improve a lot. A．keep B．kept C．will keep D．have kept 16．—Can you go to the movies with me tonight? —I have to ask my mom. If I ________, I will go with you. A．have allowed B．will allow C．was allowed D．am allowed 17．It’s impossible to achieve anything________ you are afraid of difficulties and give up easily. A．though B．if C．unless D．until 18．________ it is fine tomorrow, we’ll go on a spring field trip. A．So B．And C．If D．Or 19．Future people will take in cleaner air ________ we plant more trees now. A．although B．but C．if D．so 20．You can taste the delicious rice noodles ________ you come to Yunnan. A．if B．though C．unless D．but 21．If it ________ tomorrow, we will go hiking in the Western Hills. A．isn’t rain B．won’t rain C．doesn’t rain D．don’t rain 22．—The weather is terrible today. Shall we go out for a picnic tomorrow? —It depends on the weather. If it ________ sunny, we’ll go. A．remains B．will remain C．remained D．is remaining 23．—The weather is terrible today. Shall we go out for a picnic tomorrow? —It depends on the weather. If it ________ sunny, we’ll go. A．remains B．will remain C．remained D．is remaining 24．Let’s play football if it ____ rain tomorrow. A．won’t B．doesn’t C．isn’t D．don’t 25．________ we have spare time, we can exercise outdoors and enjoy nature. A．If B．Until C．Before D．Though 26．________ you visit my hometown, Gansu. Don’t miss Lanzhou Beef Noodles. It is a popular local snack. A．Although B．Unless C．If D．Before 27．You will know more about its culture ________ you go around Lianyungang. A．if B．because C．though D．unless 28．—Listen! Mary is singing in the classroom. She has a very good voice. —Yes, I am sure she’ll get a good place ________ she takes part in the singing competition. A．if B．before C．though D．unless 29．—We will win the competition ________ we all pull together. —Yes. Teamwork plays an important role. A．if B．but C．though D．unless 30．You won’t be successful you don’t try your best to do something. A．if B．although C．unless 答案： 1．C 【详解】句意：——我在考虑明天去海滩。——这是个好主意。如果不下雨，你会玩得很开心。 考查连词辨析。though尽管；until直到……才；if如果；since自从。根据“You’ll have fun…it doesn’t rain.”可知，前后句之间是条件关系，此处应用if引导条件状语从句。故选C。 2．A 【详解】句意：如果你努力练习，你会擅长你正在学习的东西。 考查连词辨析。if如果；but但是；unless除非；or或者。根据“you practice hard”可知，此处描述一个假设的情景，是条件状语从句。故选A。 3．A 【详解】句意：——如果学生们明天有户外活动，会发生什么？——他们会为它准备食物和饮料。 考查if引导的条件状语从句。根据“What ... if the students ... an outdoor activity tomorrow?”可知，句子是含有if引导的条件状语从句的主从复合句，时态遵循“主将从现”，第一空应用一般将来时“will do”，应是will happen；第二空应用一般现在时，主语是the students，谓语动词用原形have。故选A。 4．A 【详解】句意：如果你吃太多甜食，你可能会有牙齿问题。记住：你吃什么就是什么。 考查连词辨析。If如果；Although尽管；So如果；Before在……之前。根据“... you eat too many sweet things, you may get tooth problems.”可知，如果吃太多甜食，可能会导致牙齿问题，应用If引导条件状语从句。故选A。 5．B 【详解】句意：如果下雪，我们可以堆雪人。 考查从属连词辨析。before在……之前，引导时间状语从句；if如果，引导条件状语从句；until直到……为止，引导时间状语从句。根据“We can make a snowman”可知，“我们可以堆雪人”这个动作发生的前提条件是“下雪”，这里需要一个表示条件的连词。故选B。 6．C 【详解】句意：如果我们努力工作，我们可以有一个美好的未来。 考查连词词义辨析。although尽管，引导让步状语从句；because因为，引导原因状语从句；if如果，引导条件状语从句；so所以，表结果。“努力工作”是“有美好未来”的条件，用“if”，故选C。 7．A 【详解】句意：如果你有一个长假，你会做什么？ 考查动词时态。根据句意和if条件句可知，if条件句遵循“主将从现”原则，这里使用将来时表示假设情况下的动作。故选A。 8．B 【详解】句意：如果这位老妇人没有座位，我会把我的座位让给她。 考查if条件状语从句的时态。if引导的条件状语从句，主句用一般将来时，为will give，从句用一般现在时表示将来，为doesn’t。故选B。 9．A 【详解】句意：如果明天下雨，我不会和我的朋友踢足球。 考查时态用法。rains下雨，动词的单三形式，用于一般现在时；will rain将下雨，一般现在时；won’t play将不玩，一般将来时的否定形式；don’t play不玩，一般现在时的否定形式。根据题意可知，该句是If引导的条件状语从句，从句用一般现在时，主句用一般将来时。从句中it是第三人称单数，谓语动词用第三人称单数形式rains；主句一般将来时，助动词用will，否定句用won’t。故选A。 10．C 【详解】句意：如果明天不下雨，我们就去钓鱼。 考查if引导的条件状语从句。根据“We...fishing if it…rain tomorrow”可知，此处是if引导的条件状语从句，需遵循“主将从现”原则，主句用一般将来时，从句应使用一般现在时。故排除选项A、B、D。主句用will go表示将来计划，从句用doesn’t rain 表示一般现在时的否定条件，故选C。 11．B 【详解】句意：如果你起床太早，你会感到困倦。 考查介词和连词。because因为（连词）；if如果（连词）；before在……前（介词）；after在……后（介词）。根据“你起床太早”会产生“你感到困倦的结果”，且前句为一般将来时，后句为一般现在时，可知符合条件状语从句的“主将从现”，故是if引导的条件状语从句。故选B。 12．B 【详解】句意：如果你同意我们的观点，请举手。 考查连词辨析。unless除非；if如果；although尽管；before在……之前。分析句子结构可知，从句是主句动作发生的条件，即“举手”的前提是“同意”，应用if引导条件状语从句。故选B。 13．D 【详解】句意：我们班明天要去野餐。如果你不去，我也不去。 考查倒装和时态。根据“If you don’t go”可知，后文表示“我也不去”，用“neither+助动词/be/情态动词+主语”的结构，野餐是在“明天”，If引导的条件句主句用一般将来时，助动词用will。故选D。 14．B 【详解】句意：——汤姆，如果你有空的话，让我们去商店给你妈妈买个礼物吧。——好的，爸爸。明天是母亲节。我差点忘了。 考查连词辨析。until直到……为止；if如果；before在……之前；because因为。根据“...you are free, let’s go to the shop and buy a gift for your mother”可知，空处所在句子为后句的肯定条件，即：如果汤姆有空闲时间，他们才能一起去买礼物，所以用if引导条件状语从句。故选B。 15．A 【详解】句意：如果我们坚持用英语写日记，我们的书面英语会提高很多。 考查动词时态。该句为if引导的条件状语从句，遵循“主将从现”原则，从句用一般现在时，主语是“we”，动词用原形。故选A。 16．D 【详解】句意：——你今晚能和我去看电影吗？——我得问我妈妈。如果我被允许，我就和你一起去。 考查一般现在时的被动语态。根据“If”可知，这是if引导的条件状语从句，其时态遵循“主将从现”原则，此处的主句是将来时态，所以if从句用一般现在时态；主语“I”与“allow”是被动关系，所以用被动语态，即am allowed。故选D。 17．B 【详解】句意：如果你害怕困难并轻易放弃，就不可能取得任何成就。 考查连词辨析。though尽管；if如果；unless除非；until直到。根据“you are afraid of difficulties and give up easily.”可知，如果害怕困难并轻易放弃，就不可能取得任何成就。故选B。 18．C 【详解】句意：如果明天天气好，我们就去春季野外旅行。 考查连词。So所以；And和；If如果；Or或者。根据“...it is fine tomorrow, we’ll go on a spring field trip.”可知，在天气好的情况下去郊游，前句是后句的条件，用if引导。故选C。 19．C 【详解】句意：如果我们现在种更多树，未来的人们将会呼吸到更清洁的空气。 考查连词辨析。although尽管；but但是；if如果；so所以。根据“Future people will take in cleaner air”可知，“现在种树”是“未来人们呼吸到更清洁的空气”的条件，用if引导条件状语从句。故选C。 20．A 【详解】句意：如果你来云南，你可以品尝到美味的米线。 考查连词辨析。if如果；though尽管；unless除非；but但是。if you come to Yunnan是taste the delicious rice noodles的肯定条件，需用if引导条件状语从句。故选A。 21．C 【详解】句意：如果明天不下雨，我们就去西山徒步旅行。这是一个条件状语从句，主句是将来时（will go），从句用一般现在时表示将来。主语“it”是第三人称单数，否定形式用“doesn’t”。故选C。 22．A 【详解】句意：——今天天气很糟糕。我们明天出去野餐好吗？    ——这要看天气。如果天气一直晴朗，我们就去。 考查时态。根据“If it...sunny, we’ll go.”可知此句为if引导的条件状语从句，主句用一般将来时，从句用一般现在时，空缺句为从句，用一般现在时，故选A。 23．A 【详解】句意：——今天天气很差。明天我们去野餐吗？——看天气情况。如果天气保持晴朗，我们就去。 考查if引导的条件状语从句的时态。根据“If...we’ll go.”可知，本句为if引导的条件状语从句，主句用了一般将来时，从句用一般现在时，从句主语为it，谓语动词用三单形式。故选A。 24．B 【详解】句意：如果明天不下雨，我们去踢足球吧。 考查助动词辨析。won’t 表示将来时的否定；doesn’t 主语是第三人称单数；isn’t 用于一般现在时，表示否定；don’t 用于一般现在时，主语是非第三人称单数。根据“Let’s play football if it”可知，if 引导的条件状语从句遵循“主将从现”原则，即主句用一般将来时，从句用一般现在时表示将来。从句主语是 it，动词是 rain，为实义动词，否定形式需要借助助动词 doesn’t，故选 B。 25．A 【详解】句意：如果我们有空闲时间，我们可以在户外锻炼，享受大自然。 考查连词。If如果；Until直到；Before在……以前；Though虽然。根据“…we have spare time, we can exercise outdoors and enjoy nature.”的语境可知，此处表示条件假设的关系，if符合。故选A。 26．C 【详解】句意：如果你来我家乡甘肃，一定不要错过兰州牛肉面。这是一种受欢迎的地方小吃。 考查连词辨析。although虽然；unless除非；if如果；before在……之前。根据“...you visit my hometown.”与“Don’t miss Lanzhou Beef Noodles.”可知，前句是后句的条件，此处用if引导条件状语从句。故选C。 27．A 【详解】句意：如果你在连云港四处游览，你将会更多地了解它的文化。 考查连词辨析。if如果；because因为；though虽然；unless除非。根据“you go around Lianyungang”与“You will know more about its culture”之间的逻辑关系可知，这里是条件关系，“你在连云港四处游览”是“你将会更多地了解它的文化”的条件。故选A。 28．A 【详解】句意：——听！玛丽正在教室里唱歌。她的嗓音非常好。——是的，我相信如果她参加歌唱比赛，她一定能名列前茅。 考查连词辨析。if如果；before在……之前；though虽然；unless除非。后句是前句的肯定条件，用if引导条件状语从句。故选A。 29．A 【详解】句意：——如果我们齐心协力，我们就会赢得这场比赛。  ——是的。团队合作起着重要的作用。 考查连词辨析。if如果，引导条件状语从句；but但是，表示转折关系；though尽管，引导让步状语从句；unless除非，引导条件状语从句，相当于if…not。根据“Teamwork plays an important role.”可知，“we all pull together”是主句成立的肯定条件，因此此处用if引导的条件状语从句。故选A。 30．A 【详解】句意：如果你不尽力去做某事，你就不会成功。 考查连词辨析。if如果；although虽然；unless除非。“you don’t try your best to do something”是“You won’t be successful”的条件，用if引导条件状语从句。故选A。 二、用单词正确形式填空 1．Where will he (see) the film if he (have) time? 2．If there (be) fewer trees, there (be) more pollution. 3．I (do) a job in my free time if I (need) money for education. 4．If she (get) up late, she ( not catch) the early bus. 5．If you (feel) tired, you should (have) a rest. 6．Where he (see) the film if he has time? 7．If there are fewer trees, there (be) more pollution. 8．If Marcia lives alone, she (keep) a pet parrot. 9．What (happen) if Mr. Smith (arrive) late? 10．If it (not rain) tomorrow, I (visit) my grandparents. 答案： 1． see has 【详解】句意：如果他有时间，他会在哪里看电影？if引导的条件状语从句，遵循“主将从现”原则。主句用一般将来时，谓语结构是will do，应填写动词原形see，从句用一般现在时，主语是he，谓语动词用三单形式。故填see；has。 2． are will be 【详解】句意：如果树少了，就会有更多的污染。根据“If”可知，该句是If引导的条件状语从句，遵循“主将从现”的原则，又根据“there”可知，该句是there be句型，要遵循“就近原则”。综上所述，从句用一般现在时，从句中 “fewer trees”是复数，所以be动词用“are”，主句用一般将来时，其结构为：will+动词原形，故第二空为will be。故填are; will be。 3． will do need 【详解】句意：如果我需要钱上学，我会在空闲时间做一份工作。if引导的条件状语从句，遵循“主将从现”原则，即主句用一般将来时，从句用一般现在时。主句“I will do a job in my free time”用一般将来时，从句“if I need money for education”用一般现在时。故填will do；need。 4． gets won’t catch/will not catch 【详解】句意：如果她起晚了，她就赶不上早班车。句子是if引导的条件状语从句，时态遵循“主将从现”的原则，主句用一般将来时，结构是will+动词原形，否定直接在will后接not，也可以缩写成won’t，从句用一般现在时，主语是she，动词用三单形式，故填gets；won’t catch/will not catch。 5． feel have 【详解】句意：如果你觉得累，你就应该休息一下。本句是if引导的条件状语从句，主句含有情态动词should，从句用一般现在时，主语是you，动词用原形；空二处should后应跟动词原形。故填feel；have。 6． will see 【详解】句意：如果他有时间，他会在哪里看电影？本句是if引导的条件状语从句，从句为一般现在时，主句用一般将来时will do，句子是特殊疑问句，助动词will应置于主语之前，后面的实义动词用原形。故填will；see。 7．will be 【详解】句意：如果有更少的树，就会有更多的污染。本题是If引导的条件状语从句，遵循“主将从现”原则，因此这里主句是一般将来时，又根据“there”可知，该句是there be的一般将来时，结构为“There will be”。故填will be。 8．will keep 【详解】句意：如果Marcia独自生活，她会养一只宠物鹦鹉。本句是if引导的条件状语从句，从句用一般现在时，主句应用一般将来时will do。故填will keep。 9． will happen arrives 【详解】句意：如果史密斯先生迟到会怎样？if引导的条件状语从句遵循“主将从现”原则，所以第一个空填will happen；从句主语为“Mr. Smith”，所以第二个空应用动词的三单形式。故填will happen；arrives。 10． doesn’t rain will visit 【详解】句意：如果明天不下雨，我将去看望我的祖父母。句子是if引导的条件状语从句，遵循主将从现，从句用一般现在时，主语是it，变否定借助助动词doesn’t，后加动词原形rain；主句用一般将来时will do。故填doesn’t rain；will visit。 三、语法选择 Hello! My name is John. I’m thirteen years old and I live in England. Teenagers often say that they’re bored and have 1 to do. In fact, I can’t understand (理解) them because I 2 feel bored. I want to talk about 3 my friends and I usually do in our free time. My best friends are Tom and David. They are in the same class 4 me. We all live close to our school, 5 we go to school on foot from Monday to Friday. We always talk about interesting things on the way to school. At weekends, we usually play sports. All of us think sports 6 good for our health. We often run, play football and play basketball in the park. When it is 7 , we go to the gym. We usually play table tennis or play badminton there. If I don’t play sports, I 8 Tom and David to my home. We will listen to music or read magazines together. Of course we play computer games on 9 Internet-but not always. Many teenagers spend a lot of time on computer games. I don’t think it is right, because 10 computer games too much is bad for our health. For this reason, we always play them once a month to relax ourselves. Do you think I spend my free time in a right way? 1．A．something B．nothing C．anything 2．A．usually B．often C．hardly 3．A．what B．when C．where 4．A．about B．as C．on 5．A．until B．after C．so 6．A．was B．is C．are 7．A．rainy B．rains C．rain 8．A．am inviting B．invited C．will invite 9．A．a B．an C．the 10．A．playing B．plays C．play 答案： 1．B 2．C 3．A 4．B 5．C 6．C 7．A 8．C 9．C 10．A 【导语】本文主要介绍了John平常做的一些事情。 1．句意：青少年经常说他们无聊无所事事。 something某事某物；nothing没有什么；anything任何事情。根据“they’re bored”可知，是没有什么事情做。故选B。 2．句意：事实上，我无法理解它们因为我几乎不觉得无聊。 usually通常；often经常；hardly几乎不。根据“I can’t understand (理解) them”可知，是表达我几乎不无聊。故选C。 3．句意：我想谈谈我和朋友们在空闲时间通常做什么。 what什么；when何时；where哪里。根据“talk about...my friends and I usually do”可知，此处表达谈谈和朋友们做什么，宾语从句中缺少宾语。故选A。 4．句意：他们和我在同一个班。 about关于；as一样；on在……上。the same as“和……一样”。固定搭配。故选B。 5．句意：我们都住在学校附近，所以我们从周一到周五步行上学。 until直到；after在……之后；so所以。根据“We all live close to our school,...we go to school on foot from Monday to Friday.”可知，前后表示因果关系，空后为结果，用so引导结果状语从句。故选C。 6．句意：我们都认为运动对我们的健康有好处。 was是，过去式；is是，单数形式；are是，复数形式。sports“运动”，名词复数形式，be动词用are。故选C。 7．句意：下雨的时候，我们去健身房。 rainy下雨的，形容词；rains下雨，三单形式；rain下雨。is后面加形容词作表语。故选A。 8．句意：如果我不运动，我会邀请汤姆和大卫来我家。 am inviting邀请，现在进行时；invited邀请， 过去式；will invite邀请，一般将来时。if引导的条件状语从句，主句用一般将来时，从句用一般现在时。故选C。 9．句意：当然我们在互联网上玩电脑游戏——但并非总是如此。 a一个，修饰辅音音素开头的单词；an一个，修饰元音音素开头的单词；the定冠词表特指。on the Internet“在网上”，固定搭配。故选C。 10．句意：我认为这是不对的，因为玩太多电脑游戏对我们的健康有害。 playing玩，动名词；plays玩，三单形式；play玩，动词原形。空处作主语用动名词形式。故选A。 4、 短文填空 （1） When you are busy or stressed, don’t forget your hobbies, such as listening to music, reading and playing ball games. If eating 1 (make) you feel better, you can go to your favorite restaurant to have a delicious meal. Parents may not think that it is useful to watch TV. However, if you 2 (worry) about your English and don’t know how to improve it, why not 3 (watch) some English TV programs? If you 4 (be) feeling bad about your weight and don’t know what to do, why not go walking or jogging? Finally, trying to keep your worries to yourself can make them worse. I like to share my problems with my friends. They always give me helpful advice. If you don’t know who to talk to, you can always 5 (write) to me. You’re never alone. 答案： 1．makes 2．worry 3．watch 4．are 5．write 【导语】本文主要介绍了一些缓解压力的方法。 1．句意：如果吃东西让你感觉更好，你可以去你最喜欢的餐馆吃一顿美味的饭。分析句子可知，if引导条件状语从句，主句中含有情态动词“can”，所以从句使用一般现在时，此处是动名词作主语，动词使用第三人称单数形式。故填makes。 2．句意：然而，如果你担心你的英语，不知道如何提高它，为什么不看一些英语电视节目？分析句子可知，if引导条件状语从句，根据“and don’t know how to improve it”可知，从句时态为一般现在时，主语为you，动词使用原形。故填worry。 3．句意：然而，如果你担心你的英语，不知道如何提高它，为什么不看一些英语电视节目？根据“why not”可知，why not do sth.“为什么不去做某事”，表示提建议，空处使用动词原形。故填watch。 4．句意：如果你对自己的体重感到不满意并且不知道该做些什么，为什么不去散步或慢跑呢？分析句子可知，if引导条件状语从句，根据“and don’t know what to do”可知，主语为you，此处使用are，与feeling构成现在进行时。故填are。 5．句意：如果你不知道该找谁说话，你可以给我写信。write是动词，情态动词can后接动词原形。故填write。 （2） If I 1 (get) five million, I want to do business. I 2 (do) a lot of things for my family. For me nothing is more important than my family. I will buy a new house for them and travel around the world. —Sally If I have five million, I 3 (use) the money to do everything I like. First, I will use two million to open my own shop. And I will use another two million to buy some new houses. In the future, the houses which I buy 4 (become) more expensive, and I will sell them to other people. 5 (final), I will use one million to buy some presents for my family and my best friends.                      —Joe I will put three million in the bank and spend two million if I 6 (have) five million. I 7 (visit) Paris, London and New York. I will eat delicious food, play games, and build a house with a 8 (swim) pool. —Anna I will buy an island if I have five million. Then I will be the king of the island. I can do what I love 9 (do) on the island. I 10 (invite) my friends to my island. —Jack 答案： 1．get 2．will do 3．will use 4．will become 5．Finally 6．have 7．will visit 8．swimming 9．to do/doing 10．will invite 【导语】本文讨论了关于“如果你有500万，你会怎么做”的话题。Sally、Joe、Anna和Jack对此给出了不同的看法。 1．句意：如果我得到五百万，我想做生意。get“得到”，动词。该句为if引导的条件状语从句，时态应遵循“主将从现”的原则，即从句时态应为一般现在时，且主语“I”为第一人称，谓语动词应用其动词原形。故填get。 2．句意：我会为我的家人做很多事情。do“做”，动词，结合语境及“If I…five million, I want to do business.”可知，此处指Sally得到五百万后将会做的事情，应用一般将来时表示计划或打算，其结构为“will do”。故填will do。 3．句意：如果我有500万，我会用这笔钱做我喜欢做的事情。use“使用”，动词。该句为if引导的条件状语从句，时态应遵循“主将从现”的原则，即主句时态应为一般将来时，其结构为“will do”。故填will use。 4．句意：在未来，我买的房子会变得更贵，我会把它们卖给别人。become“变得”，动词，又结合“In the future”可知，时态应用一般将来时，其结构为“will do”，指房子将会变得更贵。故填will become。 5．句意：最终，我将用一百万买一些礼物给我的家人和我最好的朋友。final“最终的”，形容词，该句结构完整，可考虑使用副词形式修饰整个句子，用于引出最后的结果，意为“最终”，且句首首字母大写。故填Finally。 6．句意：我会存300万到银行，如果我有500万，我会花掉200万。have“有”，动词。该句为if引导的条件状语从句，时态应遵循“主将从现”的原则，即从句时态应为一般现在时，且主语“I”为第一人称，谓语动词应用其动词原形。故填have。 7．句意：我将访问巴黎、伦敦和纽约。visit“拜访，参观”，动词，结合语境及“I will put three million in the bank and spend two million if I…five million.”可知，此处指Anna得到五百万后将会做的事情，应用一般将来时表示计划或打算，其结构为“will do”。故填will visit。 8．句意：我会吃美味的食物，玩游戏，建一个有游泳池的房子。swim“游泳”，动词。结合语境可知，此处指修建“游泳池”，应用其对应的动名词形式与之搭配，swimming pool“游泳池”符合语境。故填swimming。 9．句意：我可以在岛上做我喜欢做的事。do“做”，动词，此处考查“love to do或love doing喜欢做某事”。故填to do/doing。 10．句意：我会邀请我的朋友到我的岛上。invite“邀请”，动词，该句表示Jack在得到五百万后将会做的事情，应用一般将来时表示计划或打算，其结构为“will do”。故填will invite。 学科网（北京）股份有限公司 $$ 2025学年新八年级英语暑假语法培优训练（人教版2024） Unit 8 Let's Communicate! if 引导的条件状语从句 语法讲义 1、 定义 if 引导的条件状语从句，是表示主句动作发生所需条件的从句。在 Unit 8 中，主 要用于讨论在不同沟通情境下可能出现的情况以及相应的结果，通过这种语法结构， 能清晰地表达条件与结果之间的逻辑关系。 二、构成形式 1.基本结构：if 引导的条件状语从句由 “ if + 从句，主句” 构成。例如：If you want to solve the problem, a face-to-face talk usually works the best.（如果你想解 决问题，面对面交谈通常是最好的方式。）其中，“ If you want to solve the problem” 是条件状语从句，“a face-to-face talk usually works the best” 是主句 。 2. 时态搭配（主将从现原则） ：在 if 引导的条件状语从句中，当主句描述将来 的情况时，主句用一般将来时（will + 动词原形），从句用一般现在时 表示将来。例如：If it doesn't rain tomorrow, we will go for a picnic.（如 果明天不下雨，我们就去野餐。）“If it doesn't rain tomorrow” 是从句， 用一般现在时；“we will go for a picnic” 是主句，用一般将来时 。 3.特殊情况：当主句是祈使句或含有情态动词（如 can, may, must 等）时，从句仍然 用一般现在时。例如：If you need help, call me.（如果你需要帮助，打 电话给我。）主句是祈使句，从句用一般现在时；If you can finish your work early today, you can go home.（如果你今天能早点完成工作，你就 可以回家。）主句含有情态动词 can ，从句用一般现在时 。 三、注意事项 1.if 从句位置：if 引导的条件状语从句可以放在主句前，也可以放在主句后。当 if 从 句在主句前时，从句后要用逗号与主句隔开；当 if 从句在主句后时，不 用逗号隔开。例如：If you stay calm and say sorry, it will help. = It will help if you stay calm and say sorry.（如果你保持冷静并道歉，这会有帮助。） 2.与其他引导词引导的状语从句区别：if 引导的条件状语从句与 when 引导的 时间状语从句在用法上有相似之处，但 when 强调时间点或时间段，而 if 强调条件。例如：When I grow up, I will be a teacher.（当我长大后， 我会成为一名教师 。 ）强调时间 ；If I study hard, I will pass the exam. （如果我努力学习，我会通过考试。）强调条件 。 语法专练 一、单项选择 1．—I’m thinking about going to the beach tomorrow. —That’s a good idea. You’ll have fun ______ it doesn’t rain. A．though B．until C．if D．since 2．You will be good at what you are learning ________ you practice hard. A．if B．but C．unless D．or 3．—What ________ if the students ________ an outdoor activity tomorrow? —They will prepare food and drinks for it. A．will happen; have B．happened; have C．will happen; will have D．happen; will have 4．________ you eat too many sweet things, you may get tooth problems. Remember: You are what you eat. A．If B．Although C．So D．Before 5．We can make a snowman ________ it snows. A．before B．if C．until 6．We can have a wonderful future ______ we work hard. A．although B．because C．if D．so 7．What ________ you do if you have a long holiday? A．will B．do C．are 8．If the old lady ________ have a seat, I ________ her my seat. A．doesn’t; give B．doesn’t; will give C．won’t; will give 9．If it ________ tommorow, I ________ football with my friends . A．rains; won’t play B．rains; don’t play C．will rain; won’t play D．rain; will play 10．We ________ fishing if it ________ rain tomorrow. A．are; doesn’t B．will go; will C．will go; doesn’t D．go; won’t 11．You will feel sleepy ________ you get up early in the morning. A．because B．if C．before D．after 12．Please raise your hand ________ you agree with us. A．unless B．if C．although D．before 13．Our class are going to have a picnic tomorrow. If you don’t go, ________. A．so do I B．neither do I C．so will I D．neither will I 14．—Tom, ________ you are free, let’s go to the shop and buy a gift for your mother. —Ok, dad. Tomorrow is Mother’s Day. I almost forgot it. A．until B．if C．before D．because 15．If we ________ a diary in English, our written English will improve a lot. A．keep B．kept C．will keep D．have kept 16．—Can you go to the movies with me tonight? —I have to ask my mom. If I ________, I will go with you. A．have allowed B．will allow C．was allowed D．am allowed 17．It’s impossible to achieve anything________ you are afraid of difficulties and give up easily. A．though B．if C．unless D．until 18．________ it is fine tomorrow, we’ll go on a spring field trip. A．So B．And C．If D．Or 19．Future people will take in cleaner air ________ we plant more trees now. A．although B．but C．if D．so 20．You can taste the delicious rice noodles ________ you come to Yunnan. A．if B．though C．unless D．but 21．If it ________ tomorrow, we will go hiking in the Western Hills. A．isn’t rain B．won’t rain C．doesn’t rain D．don’t rain 22．—The weather is terrible today. Shall we go out for a picnic tomorrow? —It depends on the weather. If it ________ sunny, we’ll go. A．remains B．will remain C．remained D．is remaining 23．—The weather is terrible today. Shall we go out for a picnic tomorrow? —It depends on the weather. If it ________ sunny, we’ll go. A．remains B．will remain C．remained D．is remaining 24．Let’s play football if it ____ rain tomorrow. A．won’t B．doesn’t C．isn’t D．don’t 25．________ we have spare time, we can exercise outdoors and enjoy nature. A．If B．Until C．Before D．Though 26．________ you visit my hometown, Gansu. Don’t miss Lanzhou Beef Noodles. It is a popular local snack. A．Although B．Unless C．If D．Before 27．You will know more about its culture ________ you go around Lianyungang. A．if B．because C．though D．unless 28．—Listen! Mary is singing in the classroom. She has a very good voice. —Yes, I am sure she’ll get a good place ________ she takes part in the singing competition. A．if B．before C．though D．unless 29．—We will win the competition ________ we all pull together. —Yes. Teamwork plays an important role. A．if B．but C．though D．unless 30．You won’t be successful you don’t try your best to do something. A．if B．although C．unless 二、用单词正确形式填空 1．Where will he (see) the film if he (have) time? 2．If there (be) fewer trees, there (be) more pollution. 3．I (do) a job in my free time if I (need) money for education. 4．If she (get) up late, she ( not catch) the early bus. 5．If you (feel) tired, you should (have) a rest. 6．Where he (see) the film if he has time? 7．If there are fewer trees, there (be) more pollution. 8．If Marcia lives alone, she (keep) a pet parrot. 9．What (happen) if Mr. Smith (arrive) late? 10．If it (not rain) tomorrow, I (visit) my grandparents. 三、语法选择 Hello! My name is John. I’m thirteen years old and I live in England. Teenagers often say that they’re bored and have 1 to do. In fact, I can’t understand (理解) them because I 2 feel bored. I want to talk about 3 my friends and I usually do in our free time. My best friends are Tom and David. They are in the same class 4 me. We all live close to our school, 5 we go to school on foot from Monday to Friday. We always talk about interesting things on the way to school. At weekends, we usually play sports. All of us think sports 6 good for our health. We often run, play football and play basketball in the park. When it is 7 , we go to the gym. We usually play table tennis or play badminton there. If I don’t play sports, I 8 Tom and David to my home. We will listen to music or read magazines together. Of course we play computer games on 9 Internet-but not always. Many teenagers spend a lot of time on computer games. I don’t think it is right, because 10 computer games too much is bad for our health. For this reason, we always play them once a month to relax ourselves. Do you think I spend my free time in a right way? 1．A．something B．nothing C．anything 2．A．usually B．often C．hardly 3．A．what B．when C．where 4．A．about B．as C．on 5．A．until B．after C．so 6．A．was B．is C．are 7．A．rainy B．rains C．rain 8．A．am inviting B．invited C．will invite 9．A．a B．an C．the 10．A．playing B．plays C．play 4、 短文填空 （1） When you are busy or stressed, don’t forget your hobbies, such as listening to music, reading and playing ball games. If eating 1 (make) you feel better, you can go to your favorite restaurant to have a delicious meal. Parents may not think that it is useful to watch TV. However, if you 2 (worry) about your English and don’t know how to improve it, why not 3 (watch) some English TV programs? If you 4 (be) feeling bad about your weight and don’t know what to do, why not go walking or jogging? Finally, trying to keep your worries to yourself can make them worse. I like to share my problems with my friends. They always give me helpful advice. If you don’t know who to talk to, you can always 5 (write) to me. You’re never alone. （2） If I 1 (get) five million, I want to do business. I 2 (do) a lot of things for my family. For me nothing is more important than my family. I will buy a new house for them and travel around the world. —Sally If I have five million, I 3 (use) the money to do everything I like. First, I will use two million to open my own shop. And I will use another two million to buy some new houses. In the future, the houses which I buy 4 (become) more expensive, and I will sell them to other people. 5 (final), I will use one million to buy some presents for my family and my best friends.                      —Joe I will put three million in the bank and spend two million if I 6 (have) five million. I 7 (visit) Paris, London and New York. I will eat delicious food, play games, and build a house with a 8 (swim) pool. —Anna I will buy an island if I have five million. Then I will be the king of the island. I can do what I love 9 (do) on the island. I 10 (invite) my friends to my island. —Jack 学科网（北京）股份有限公司 $$