if 引导条件状语从句-2025-2026学年七年级英语下册句型全解（北师大版）

初一下册北师大版 【寒假专版】A版句型全解 寒假专版 【A版句型全解】f引导条件状语从句 初中·北师大版·初一下册 基本结构 句型结构：f引导条件状语从句 f引导的条件状语从句表示假设的情况，通常遵循”主将从现”原则，即主句用一般将来时， 从句用一般现在时：若主句为祈使句或含有情态动词(can/may/must等)，从句也用一般现在时。 从句可位于主句前或后，位于主句前时，需用逗号与主句隔开。 例句展示： If it rains tomorrow,we will stay at home.(如果明天下雨，我们就待在家里) You can pass the exam if you study hard.(如果你努力学习，就能通过考试) 句型精讲（核心考法） 考法1：f引导条件状语从句的时态搭配（中考核心考点） 规则1：主句用一般将来时，从句用一般现在时（主将从现) 例句：If it rains tomorrow,we will stay at home 规则2：主句含情态动词(can/may/must/should等)，从句用一般现在时 例句：You must see a doctor if you feel sick 规则3：主句用祈使句，从句用一般现在时 例句：Close the window if the wind blows strongly.. 真题再现(2024北师大版七年级下册期末测试) Ifhe (study)hard,he will pass the exam. 答案：studies 解析：主句用一般将来时，从句用一般现在时，主语he是第三人称单数，谓语动词用sud 1 初一下册北师大版 【寒假专版】A版句型全解 ies 考法2：f引导条件状语从句与简单句的转换 转换规则：if条件句（肯定）可转换为”祈使句+d+简单句'：f条件句（否定）可转换为”祈使 句+0r+简单句” 例句1： 原句：If you work hard,.you will succeed. 转换句：Work hard and you will succeed. 例句2： 原句：If you don't hurry up,you will be late. 转换句：Hurry up or you will be late. 真题再现(2023北师大版七年级下册同步练习) If you study English every day,you will improve it.(改为同义句) English every day you will improve it. 答案：Study and 解析：if条件句（肯定）转换为”祈使句+and+简单句”结构 考法3：f引导宾语从句与条件状语从句的辨析 判断规则：f表示”是否”时引导宾语从句，时态根据主句时态变化：f表示”如果”时引导条件状 语从句，遵循”主将从现”等规则 例句1（宾语从句）： Idon't know if he will come tomorrow.(是否) 例句2（条件状语从句)： If he comes tomorrow,I will call you.(如果) 真题再现(2024北京朝阳区七年级下册期中) Could you tell me if it(rain)tomorrow?If it (rain),we won't go hiking. 答案：will rain rains 初一下册北师大版 【寒假专版】A版句型全解 解析：第一空if表”是否”，引导宾语从句，根据tomorrow用一般将来时：第二空f表，如 果”，引导条件状语从句，用一般现在时 考法4：if引导条件状语从句的省略（主从句主语一致且含be动词） 省略规则：当主从句主语一致，且从句谓语含be动词时，可省略从句主语和be动词 例句1： 原句：If you are free,.please call me. 省略句：Iffree,please call me. 例句2： 原句：You can join us if you want to. 省略句：You can join us if you want.. 真题再现(2023北师大版七年级下册单元测试) (be)late,you should say sorry to the teacher. 答案：you are 解析：此处主从句主语一致但不可省略，因教材要求七年级掌握完整形式，不考查省略用 法 考法5：f引导条件状语从句的反意疑问句 疑问规则：反意疑问句部分与主句保持一致（主句用肯定，疑问部分用否定：主句用否定，疑问部 分用肯定) 例句1： He will go to the party if he is invited,? 疑问部分：won'the 例句2： You can't pass the exam if you don't study hard,? 疑问部分：can you 真题再现(2024北师大版七年级下册期末) They will have a picnic if it doesn't rain, 3 初一下册北师大版 【寒假专版】 A版句型全解 答案：won't they 解析：主句为肯定句，反意疑问句部分用否定，will的否定形式为won't 句型综合训练 训练1：单项选择（考察if引导条件状语从句） 1.Ifit tomorrow,we will cancel the picnic. A.rain B.rains C.will rain D.rained 2.You can borrow my book if you it carefully. A.read B.will read C.reads D.reading 3.I don't know if she to the party tonight.If she I will let you know. A.comes;comes B.will come;will come C.comes;will come D.will come;comes 4.If you free this weekend,let's go to the movies. A.are B.will be C.were D.being 5.They late unless they up now. A.will be;hurry B.are;will hurry C.be;hurry D.will be;will hurry 6.Ifhe harder,he could pass the exam last term. A.study B.studies 4 初一下册北师大版 【寒假专版】 A版句型全解 C.studied D.will study 7.Could you tell me if the train on time?If it,I need to call my friend A.arrives;arrives B.will arrive;arrives C.arrives;will arrive D.will arrive:will arrive 8.If you the library book,you must pay for it. A.lose B.will lose C.lost D.losing 训练2：同义句转换（考察f句型变形） 1.If you don't get up early,you will miss the bus. or you will miss the bus. 2.If you listen carefully,you will understand the lesson and you will understand the lesson. 3.If he doesn't study hard,he won't pass the exam. or he won't pass the exam. 4.If we plant more trees,our city will be greener. and our city will be greener. 5.If you don't finish your homework,you can't watch TV. → or you can't watch TV. 6.If she practices every day,she will improve her English. every day and she will improve her English. 7.If you don't wear warm clothes,you will catch a cold. _warm clothes or you will catch a cold. 8.If you follow my advice,you will solve the problem. → my advice and you will solve the problem 训练3：完成句子（考察f语境运用） 初一下册北师大版 【寒假专版】 A版句型全解 1.如果明天天气好，我们就去公园。 →If the weather fine tomorrow,we go to the park. 2.我不知道他是否会参加会议。如果他参加，我会告诉你。 →Idon't know if he the meeting.If he ，I tell you. 3.如果你努力学习，你就能取得好成绩。 →If you youget good grades. 4.如果明天下雨，我们就待在家里看书。 →Ifit tomorrow.we at home and read books 5.你能告诉我他是否会来参加聚会吗？如果他来，我就准备他最喜欢的食物。 →Could you tell me if he to the party?If he,I prepare his favorite food. 6.如果她有时间，她会帮助我们。 →If she time,she help us. 7.如果我是你，我会向老师求助。 →IfIyou,I ask the teacher for help. 8.如果他们不快点，就会错过火车。 →If they up,theymiss the train. 9.如果他不努力，就不会成功。 →Ifhe hard,he not succeed. 10.我不知道这台电脑是否还能修好。如果能修好，我就不买新的了。 -I don't know if the computer repaired.If it .I not buy a new one. 训练4：写作高级句式（考察f句型应用） 1.如果我们不保护野生动物，它们将会灭绝。 →Ifwe wild animals,they die out. 2.我不知道明天是否会下雪。如果下雪，我们就不去爬山了。 →Idon't know if it tomorrow.If it,we not go climbing. 3.如果你每天坚持阅读，你的英语水平将会提高。 →If you every day,your English improve 4.如果我有足够的钱，我会环游世界。 6 初一下册北师大版 【寒假专版】 A版句型全解 →IfI enough money,I travel around the world. 5. 如果明天气温降到零度以下，水管可能会冻裂。 -If the temperaturebelow zero tomorrow,the water pipes freeze and burst. 6.如果你不早点出发，你就不能按时到达机场。 →If you early,you not reach the airport on time. 参考答案 I训练1：单项选择 1.B2.A3.D4.A5.A6.C7.B8.A Ⅱ.训练2：同义句转换 1.Hurry up early 2.Listen carefully 3.Study hard 4.Plant more trees 5.Finish your homework 6.Practice 7.Wear 8.Follow L.训练3：完成句子 1.is will 2.will attend comes will 3.study hard can 4.rains will stay 5.will come comes will 6.has will 7.were would 8.don't hurry will 9.doesn't work will 10.can be can will V.训练4：写作高级句式 1.don't protect will 2.will snow snows will 3.keep reading will 4.have will 5.drops may 6.don't leave will 7