Unit 4 Helping out表示“可能性与推测”的常用情态动词(单元核心语法精练)英语新教材外研版八年级下册

2026-01-21
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学段 初中
学科 英语
教材版本 初中英语外研版八年级下册
年级 八年级
章节 Unit 4 Helping out
类型 题集-专项训练
知识点 情态动词
使用场景 同步教学-单元练习
学年 2026-2027
地区(省份) 全国
地区(市) -
地区(区县) -
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发布时间 2026-01-21
更新时间 2026-01-21
作者 小米夏
品牌系列 上好课·上好课
审核时间 2026-01-21
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Unit 4 Helping out 核心语法精练( 表示“可能性与推测”的常用情态动词 ) 目录 A 考点概览·知识回顾 1 B 考点夯基·专项突破 2 一.单项选择 2 二.完成句子 8 C 综合攻坚·能力跃升 10 一.语法填空 10 二.选词填空 11 表示“可能性与推测”的常用情态动词 一. 情态动词may/might表示可能性   may/might表示将要发生或正在发生的可能性。此时,might不是may的过去式,它所表示的可能性比may所表示的可能性(现在或将来的可能性)小一些。may不用于表示是否可能的疑问句。 He may not know the answer.他可能不知道答案。 Mike might phone. If he does, could you ask him to ring later?Mike或许会打电话。如果他打电话,你能否让他晚点再打过来? 注意表示“可能”的常见词possible、possibly、probably、maybe等 单词 例句 possible Is it possible to get tickets for the game?有没有可能弄到比赛的门票? possibly/ probably It will possibly/probably take us about a week to complete the task.我们可能需要一星期左右来完成这项任务。 maybe The chair will cost one hundred, maybe two hundred yuan.这把椅子要花费一百元,或许两百元。 二. 情态动词must、can、could表示推测 单词 用法 must 表示有把握的推测,意为“一定,肯定”,通常只用于肯定句。 can 可表示对现在或将来的推测,意为“会,可能”,往往用于否定句和疑问句。用于疑问句时,can比could表示的可能性要大;用于否定句时,can't意为“不可能”,表示有把握的否定推测。 could 可表示对现在或将来的推测,意为“会,可能”,可用于肯定句、否定句和疑问句。 You must be tired after the long work. 长时间工作之后,你一定累了。 Can/Could this be true? 这有可能是真的吗? It can't be David because he has gone to Beijing. 不可能是David,因为他去北京了。 一.单项选择 1.(24-25八年级下·上海徐汇·期中)Use the strongest filter cream when in the sunlight, or your skin _________ be hurt. A.must B.may C.should D.ought to 2.(24-25八年级下·上海闵行·期中)—________ I park my car here for a while? —No, you mustn’t. Do you see the sign “NO PARKING”? A.Would B.Need C.Must D.May 3.(24-25八年级下·天津滨海新·期末)There ________ be a few showers, so take an umbrella with you. A.can’t B.should C.may D.mustn’t 4.(24-25八年级下·福建泉州·期中)—Dad, may I go out to play football for a while? —No, you ________. The air outside is too dirty to do sports. A.can’t B.shouldn’t C.needn’t 5.(24-25八年级下·江苏南京·期中)—________ I come back before five o’clock? —No, you ________. But you ________ be back later than seven o’clock. A.Must; needn’t; can’t B.May; mustn’t; can’t C.Can; can’t; can’t D.Need; must; mustn’t 6.(24-25七年级下·天津滨海新·期末)They ________ have a picnic next week, but they are not sure. A.must B.needn’t C.might D.shouldn’t 7.(24-25八年级下·安徽池州·期末)—Whose umbrella is this? —It ______ belong to Mr. Smith. Look, his name is on it. A.can B.might C.must D.should 8.(24-25八年级下·天津河北·期中)Bob ________ go to the Science Club to make model plane with us, but he hasn’t decided. A.must B.might C.shouldn’t D.can’t 9.(2025·黑龙江哈尔滨·二模)We never know what ______ happen in the future, but we can prepare for the worst and hope for the best. A.must B.might C.shall 10.(23-24八年级下·广西南宁·期中)—Dad, I’ve received a big box by post. What is in it? —I’m not sure. It ________ be a present from your grandparents. A.might B.must C.should 11.(24-25八年级下·江苏泰州·期中)—I haven’t seen Sally for days. —She’s just lost her job. I’m sure she ________ be busy looking for a new one. A.can B.should C.must D.may 12.(24-25七年级下·北京·期中)—Mom, can I play basketball with my friends tomorrow? —Yes, you can. But you ________ be back before 6 p.m. A.can B.may C.would D.must 13.(24-25八年级下·全国·课后作业)—Look! There’s a book. —Oh, it ________ be Kitty’s. Only she likes to read this kind of book. A.can B.must C.may D.might 14.(22-23八年级下·上海奉贤·期中)Mary’s parents have bought a large house with a swimming pool in the city centre. It ________ be very expensive. A.can B.must C.can’t D.mustn’t 15.(22-23八年级下·重庆·开学考试)Look at the school rules. It says we _________ be late for school. A.can B.must C.needn’t D.mustn’t 16.(2025·上海杨浦·一模)—Did you hear what he just said? —He ________ be joking—there’s no way that’s true! A.can B.need C.must D.should 17.(25-26八年级下·江苏宿迁·期中)—Look! It ________ be Mr. Wang. —No, it ________ be him. He has gone abroad. A.may; mustn’t B.must; may not C.must; can’t D.can; may not 18.(25-26八年级上·江苏无锡·期中)—My parents are always busy with their work. Sometimes I have to cook by myself. —Oh, dear. You ________ be careful when cooking. A.can B.can’t C.should D.shouldn’t 19.(24-25八年级下·上海松江·期末)—Look! The man over there is wearing a strange hat. Is he Mr. Smith? —It ________ be him. Mr. Smith has gone to Beijing on business and he won’t be back until next week. A.mustn’t B.can’t C.needn’t D.shouldn’t 20.(24-25八年级下·天津南开·期末)—Is this bike Lucy’s? —Well, it ________ be Lucy’s. Hers is red, but it is blue. A.can’t B.must C.should D.needn’t 21.(24-25七年级下·陕西西安·月考)— ________ I come back before five o’clock? — No, you ________. But you ________ be back later than seven o’clock. A.Must; needn’t; needn’t B.May; mustn’t; can’t C.Can; can’t; can’t D.Must; needn’t; can’t 22.(2025·云南·模拟预测)—What’s the date for the graduation ceremony? —It ______ be on June 25th. But I’m not sure. A.could B.couldn’t C.must D.mustn’t 23.(23-24八年级下·全国·课后作业)We ________ get something ________ after watching the movie. I am hungry now. A.mightn’t; to eat B.might; eating C.couldn’t; eating D.could; to eat 24.(24-25八年级上·全国·单元测试)—Listen! Is Bruce singing in the class? —It ________ be him. But I’m not sure. A.need B.could C.must D.would 25.(24-25八年级下·安徽合肥·期中)—Someone is knocking at the door. Is it Daisy? —It ________ be her. She is having an important meeting in the meeting room. A.must B.mustn’t C.can D.can’t 二.完成句子 26.(21-22八年级下·湖北宜昌·期中)高老师不可能在教室。我刚刚在操场看见她了。 Miss Gao . I just saw her in the playground. 27.(24-25八年级下·全国·假期作业)——请你帮我洗车好吗? ——对不起,我不能。我必须去上学。 —Could you please help me wash the car? — , . I have to go to school. 28.(24-25八年级下·全国·假期作业)——请问我能用一下你的自行车吗? ——不,你不能。我得骑车外出。 — I your bike? —No, you . I have to go out. 29.(25-26八年级下·全国·单元测试)你最好去看牙医,可能需要拍X光片。 You should see a dentist. You an X-ray. 30.(23-24八年级下·全国·课后作业)今天可能会下雨,因此我们最好现在就动身。 It today, so we’d better leave now. 31.(24-25八年级下·全国·假期作业)他们现在可能在上海了。 They in Shanghai now. 32.(23-24八年级下·全国·课前预习)它们肯定非常有价值。 They really valuable. 33.(19-20八年级下·山东聊城·单元测试)他肯定在家;灯是亮着的。 He at home; the light is on. 34.(19-20八年级下·山东聊城·单元测试)你一定是个作家,对吗? You a writer, aren’t you? 35.(20-21八年级下·全国·课后作业)这部电影一定很受欢迎。 This movie very popular. 一.语法填空 (24-25八年级下·湖南湘潭·期末)阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。 In the past few years, great changes have taken place around me. The roads 1 (use) to be dirty and crowded. People lived 3 old and small houses. The air wasn’t fresh enough. Sometimes, terrible smells filled the area. People had badly polluted the river and thrown rubbish into it. Nowadays, wide and clean roads make traveling easy for everyone. We can choose 2 (difference) kinds of transportation to go anywhere. The city has 4 (build) lots of tall buildings. So far, most of 5 (we) have moved into big and modern houses. The river has become much 6 (clean) than before, with clear water flowing through it. The blue sky and white clouds create 7 beautiful scene, and birds sing 8 (happy) . The environment in my hometown has improved greatly, 9 we still need to work together to keep it this way. Thanks to the government’s efforts, our living conditions have improved a lot recently. I’m sure as time goes by, our 10 (life) will become better and better. 二.选词填空 (24-25八年级下·河南洛阳·期末)阅读短文,从方框中选择适当的词并用其正确形式填空,使短文通顺、意思完整。每空限填一词,每词限用一次。 succeed   win   famous   skill   send   but   bad   spend   try   interest Quan Hongchan, a 14-year-old girl, amazed the whole world at the Tokyo Olympic Games. She 1 the gold medal for the women’s 10-meter platform diving on August 5th. Quan is not only the youngest competitor in the women’s diving field, 2 also the youngest of 431 athletes that China 3 to Tokyo for the Olympics. In fact, she became the second-youngest Chinese diver to win a gold medal after Fu Mingxia. Quan was born in Zhanjiang. The small city is 4 for cultivating (培养) diving champions (冠军). Her parents were not rich. Things got even 5 after Quan’s mother was hit by a car on her way to work in 2017. But both of her parents were very supportive (支持) of her diving. Quan became 6 in diving when she was seven years old. Every day, she 7 almost eight hours in training basic diving 8 . She worked really hard in order to make her dream come true. Where there is a will, there is a way. Quan Hongchan is a superstar now, but she still keeps 9 hard. It’s true that she will make greater 10 in the 2024 Paris Olympic Games. 1 / 12 学科网(北京)股份有限公司 $ Unit 4 Helping out 核心语法精练( 表示“可能性与推测”的常用情态动词 ) 目录 A 考点概览·知识回顾 1 B 考点夯基·专项突破 2 一.单项选择 2 二.完成句子 8 C 综合攻坚·能力跃升 10 一.语法填空 10 二.选词填空 11 表示“可能性与推测”的常用情态动词 一. 情态动词may/might表示可能性   may/might表示将要发生或正在发生的可能性。此时,might不是may的过去式,它所表示的可能性比may所表示的可能性(现在或将来的可能性)小一些。may不用于表示是否可能的疑问句。 He may not know the answer.他可能不知道答案。 Mike might phone. If he does, could you ask him to ring later?Mike或许会打电话。如果他打电话,你能否让他晚点再打过来? 注意表示“可能”的常见词possible、possibly、probably、maybe等 单词 例句 possible Is it possible to get tickets for the game?有没有可能弄到比赛的门票? possibly/ probably It will possibly/probably take us about a week to complete the task.我们可能需要一星期左右来完成这项任务。 maybe The chair will cost one hundred, maybe two hundred yuan.这把椅子要花费一百元,或许两百元。 二. 情态动词must、can、could表示推测 单词 用法 must 表示有把握的推测,意为“一定,肯定”,通常只用于肯定句。 can 可表示对现在或将来的推测,意为“会,可能”,往往用于否定句和疑问句。用于疑问句时,can比could表示的可能性要大;用于否定句时,can't意为“不可能”,表示有把握的否定推测。 could 可表示对现在或将来的推测,意为“会,可能”,可用于肯定句、否定句和疑问句。 You must be tired after the long work. 长时间工作之后,你一定累了。 Can/Could this be true? 这有可能是真的吗? It can't be David because he has gone to Beijing. 不可能是David,因为他去北京了。 一.单项选择 1.(24-25八年级下·上海徐汇·期中)Use the strongest filter cream when in the sunlight, or your skin _________ be hurt. A.must B.may C.should D.ought to 【答案】B 【详解】句意:在阳光下时要使用防晒指数最高的防晒霜,否则你的皮肤可能会受到伤害。   考查情态动词辨析。must必须,一定;may可能,可以;should应该;ought to应该。  根据“Use the strongest filter cream when in the sunlight”可知,皮肤受伤是有发生的可能,但并非必然,may“可能”符合句意。故选B。 2.(24-25八年级下·上海闵行·期中)—________ I park my car here for a while? —No, you mustn’t. Do you see the sign “NO PARKING”? A.Would B.Need C.Must D.May 【答案】D 【详解】句意:——我可以把车停在这里一会儿吗?——不行,你不许。你看到“禁止停车”的标志了吗? 考查情态动词。Would愿意;Need需要;Must必须;May可以。根据“I park my car here for a while?”及“No, you mustn’t.”可知,问句是请求许可,用May表示。故选D。 3.(24-25八年级下·天津滨海新·期末)There ________ be a few showers, so take an umbrella with you. A.can’t B.should C.may D.mustn’t 【答案】C 【详解】句意:可能会有几场阵雨,所以你带把伞吧。 考查情态动词辨析。can’t不可能;should应该;may可能;也许;mustn’t禁止。根据“so take an umbrella with you”可知,“可能”有雨,所以你带把伞。故选C。 4.(24-25八年级下·福建泉州·期中)—Dad, may I go out to play football for a while? —No, you ________. The air outside is too dirty to do sports. A.can’t B.shouldn’t C.needn’t 【答案】A 【详解】句意:——爸爸,我可以出去踢会儿足球吗?——不,你不可以。外面的空气太脏了,不适合做运动。 考查动词辨析。can’t不能;shouldn’t不应该;needn’t不必。may表示委婉语气,引导一般疑问句,否定回答用No,…can’t,故选A。 5.(24-25八年级下·江苏南京·期中)—________ I come back before five o’clock? —No, you ________. But you ________ be back later than seven o’clock. A.Must; needn’t; can’t B.May; mustn’t; can’t C.Can; can’t; can’t D.Need; must; mustn’t 【答案】A 【详解】句意:——我必须在五点前回来吗?——不,你不必。但是你不能晚于七点回来。 考查情态动词辨析。根据“—...I come back before five o’clock? —No, you...But you...be back later than seven o’clock.”可知,第一、二空:问句是一般疑问句,询问是否“必须”做某事,应该使用“Must”;情态动词“Must”用于提问时,否定回答用“needn’t”;第三空:此处表示你“不能”晚于七点回来,“can’t”表示“不能”,符合语境。故选A。 6.(24-25七年级下·天津滨海新·期末)They ________ have a picnic next week, but they are not sure. A.must B.needn’t C.might D.shouldn’t 【答案】C 【详解】句意:他们下周可能去野餐,但还不确定。 考查动词辨析。must一定;needn’t不必;might可能;shouldn’t不应该。根据“but they are not sure”可知,他们还不确定是否去野餐,此处应指他们下周可能去野餐。故选C。 7.(24-25八年级下·安徽池州·期末)—Whose umbrella is this? —It ______ belong to Mr. Smith. Look, his name is on it. A.can B.might C.must D.should 【答案】C 【详解】句意:——这是谁的伞?——这一定属于斯密斯先生。看,他的名字在上面。 考查情态动词。can能够;might可能;must一定,必须;should应该。此处考查肯定推测,因为名字在上面,所以用must be表“一定是”。故选C。 8.(24-25八年级下·天津河北·期中)Bob ________ go to the Science Club to make model plane with us, but he hasn’t decided. A.must B.might C.shouldn’t D.can’t 【答案】B 【详解】句意:鲍勃可能会和我们去科学俱乐部一起做飞机模型,但是他还没有决定。 考查情态动词。must必须;might可能;shouldn’t不应该;can’t不可能。根据“but he hasn’t decided”可知,他还没有决定,所以此处指鲍勃可能会和我们去科学俱乐部,might“可能”符合语境,表示可能性。故选B。 9.(2025·黑龙江哈尔滨·二模)We never know what ______ happen in the future, but we can prepare for the worst and hope for the best. A.must B.might C.shall 【答案】B 【详解】句意:我们永远不知道未来可能会发生什么,但我们可以做最坏的准备,抱最好的希望。 考查情态动词词义辨析。must必须,一定,表示肯定的推测;might可能,表示不确定的推测;shall将,常用于第一人称,表示将来时态或用于征求意见。由“never know”和“in the future”可知,此处是对未来不确定的推测,使用“might”符合语境。故选B。 10.(23-24八年级下·广西南宁·期中)—Dad, I’ve received a big box by post. What is in it? —I’m not sure. It ________ be a present from your grandparents. A.might B.must C.should 【答案】A 【详解】句意:——爸爸,我收到了一个大包裹。里面是什么?——我不确定。它可能是你祖父母送给你的礼物。 考查情态动词。might可能;must一定;should应该。根据“I’m not sure.”可知,表示不确定的推测用might,故选A。 11.(24-25八年级下·江苏泰州·期中)—I haven’t seen Sally for days. —She’s just lost her job. I’m sure she ________ be busy looking for a new one. A.can B.should C.must D.may 【答案】C 【详解】句意:——我好几天没见到萨莉了。——她刚失去了她的工作。我肯定她一定在忙着找新工作。 考查情态动词语义辨析。can能;should应该;must一定,表示肯定推测;may可能,表示可能推测。根据“She’s just lost her job.”可知,此处是有把握的肯定推测,“must”符合语境。故选C。 12.(24-25七年级下·北京·期中)—Mom, can I play basketball with my friends tomorrow? —Yes, you can. But you ________ be back before 6 p.m. A.can B.may C.would D.must 【答案】D 【详解】句意:——妈妈,我明天可以和我的朋友们一起打篮球吗?——是的,你可以。但是你必须在下午六点之前回来。   考查情态动词辨析。can能,会;may也许,可能;would将会;must必须。根据“But”可知,此处表示转折,前面说可以和朋友打篮球,后面应该是提出要求,“必须在下午六点之前回来”,must符合语境,故选D。 13.(24-25八年级下·全国·课后作业)—Look! There’s a book. —Oh, it ________ be Kitty’s. Only she likes to read this kind of book. A.can B.must C.may D.might 【答案】B 【详解】句意:——看!有一本书。——哦,这本书一定是Kitty的。只有她喜欢读这种类型的书。 考查情态动词。can可能,常用于疑问句和否定句中;must一定,表示有把握的推测,常用于肯定句中;may可能,常用于肯定句中,其可能性不大;might也许,其可能性不大,比may语气弱。根据“Oh, it...be Kitty’s. Only she likes to read this kind of book.”可知,该句为肯定句,表示有把握的推测,用must。故选B。 14.(22-23八年级下·上海奉贤·期中)Mary’s parents have bought a large house with a swimming pool in the city centre. It ________ be very expensive. A.can B.must C.can’t D.mustn’t 【答案】B 【详解】句意:玛丽的父母在市中心买了一栋带游泳池的大房子。那一定很贵。 考查情态动词。can能;must一定,必须;can’t不能,不可能;mustn’t禁止,不应该。根据“a large house with a swimming pool in the city centre.”可知,前面提到玛丽的父母在市中心买了一个带游泳池的大房子,按照常理推测,这样的房子肯定很贵。故选B。 15.(22-23八年级下·重庆·开学考试)Look at the school rules. It says we _________ be late for school. A.can B.must C.needn’t D.mustn’t 【答案】D 【详解】句意:看这些校规。上面说我们不许上学迟到。 考查情态动词辨析。can能够;must必须;needn’t不需要;mustn’t禁止,不许。根据题意,学校的规则是不准迟到。故选D。 16.(2025·上海杨浦·一模)—Did you hear what he just said? —He ________ be joking—there’s no way that’s true! A.can B.need C.must D.should 【答案】C 【详解】句意:——你听到他刚才说的话了吗?——他一定是在开玩笑——这不可能是真的! 考查情态动词。can能;need需要;must一定;should应该。根据“be joking—there’s no way that’s true”可知不可能是真的,所以是认为他一定是在开玩笑。故选C。 17.(25-26八年级下·江苏宿迁·期中)—Look! It ________ be Mr. Wang. —No, it ________ be him. He has gone abroad. A.may; mustn’t B.must; may not C.must; can’t D.can; may not 【答案】C 【详解】句意:——看!那一定是王先生。——不,不可能是他。他已经出国了。 考查情态动词的用法。may可能;mustn’t禁止;must一定;may not不得;can’t不可能;can能。根据“Look! It…be Mr. Wang.”可知,说话者看到某人,认为那很可能是王先生,表达一种高度确定的推测,应使用must,表示“一定”;根据答语“He has gone abroad.”可知,他已出国,因此不可能是他,否定推测用can’t。故选C。 18.(25-26八年级上·江苏无锡·期中)—My parents are always busy with their work. Sometimes I have to cook by myself. —Oh, dear. You ________ be careful when cooking. A.can B.can’t C.should D.shouldn’t 【答案】C 【详解】句意:——我的父母总是忙于工作,有时我得自己做饭。——哦,亲爱的,你做饭时应该小心。 考查情态动词的用法。can能够;can’t不能;should应该;shouldn’t不应该。根据 “be careful when cooking” 可知,做饭时应小心,这是表示建议,用情态动词should。故选C。 19.(24-25八年级下·上海松江·期末)—Look! The man over there is wearing a strange hat. Is he Mr. Smith? —It ________ be him. Mr. Smith has gone to Beijing on business and he won’t be back until next week. A.mustn’t B.can’t C.needn’t D.shouldn’t 【答案】B 【详解】句意:——看!那边的那个男人戴着一顶奇怪的帽子。他是史密斯先生吗?——不可能是他。史密斯先生去北京出差了,要到下周才会回来。 考查情态动词的用法。mustn’t禁止;can’t不可能;needn’t不需要;shouldn’t不应该。根据下文“Mr. Smith has gone to Beijing on business and he won’t be back until next week.”可知,此处表示那个人“不可能”是史密斯先生,应该用can’t。故选B。 20.(24-25八年级下·天津南开·期末)—Is this bike Lucy’s? —Well, it ________ be Lucy’s. Hers is red, but it is blue. A.can’t B.must C.should D.needn’t 【答案】A 【详解】句意:——这是露西的自行车吗?——嗯,它不可能是露西的。她的是红色的。但它是蓝色的。 考查情态动词。can’t不可能;must必须;should应该;needn’t不必。根据“Hers is red, but it is blue.”可知,它不可能是露西的。故选A。 21.(24-25七年级下·陕西西安·月考)— ________ I come back before five o’clock? — No, you ________. But you ________ be back later than seven o’clock. A.Must; needn’t; needn’t B.May; mustn’t; can’t C.Can; can’t; can’t D.Must; needn’t; can’t 【答案】D 【详解】句意:——我必须在五点之前回来吗?——不,你不必。但是你不能晚于七点回来。 考查情态动词用法。Must必须;needn’t不必;May也许;mustn’t禁止;can’t不可以、不能。根据情境,第一空表示必须五点前回来吗,用Must提问比较合适,否定回答用needn’t,表示“不必”。第三空表达不可以晚于七点回来,用can’t。故选D。 22.(2025·云南·模拟预测)—What’s the date for the graduation ceremony? —It ______ be on June 25th. But I’m not sure. A.could B.couldn’t C.must D.mustn’t 【答案】A 【详解】句意:——毕业典礼的日期是什么时候?——可能在6月25日。但我不确定。 考查情态动词。could表示可能性,语气较委婉、不确定;couldn’t不可能;must一定,表示肯定的推测,语气非常强烈;mustn’t禁止,不允许。根据答句“But I’m not sure.”可知,这里是一种不确定的推测,应用“could”。故选A。 23.(23-24八年级下·全国·课后作业)We ________ get something ________ after watching the movie. I am hungry now. A.mightn’t; to eat B.might; eating C.couldn’t; eating D.could; to eat 【答案】D 【详解】句意:看完电影我们可以去吃点东西。我现在饿了。 考查情态动词和非谓语动词。mightn’t不会;might可能,可以;couldn’t不可能;could可能,可以。根据“I am hungry now.”可知,指看完电影后可能得吃点东西。结合get sth to do sth意为“借助某物做某事”,动词不定式to eat作定语,修饰不定代词something。故选D。 24.(24-25八年级上·全国·单元测试)—Listen! Is Bruce singing in the class? —It ________ be him. But I’m not sure. A.need B.could C.must D.would 【答案】B 【详解】句意:——听着!布鲁斯正在班上唱歌吗?——可能是他。但我不确定。 考查情态动词表推测。need需要;could可能;must一定;would愿意,将要。根据“But I’m not sure.”可知,此处说话人不确定是不是布鲁斯。空处应用could表示“可能是他”。故选B。 25.(24-25八年级下·安徽合肥·期中)—Someone is knocking at the door. Is it Daisy? —It ________ be her. She is having an important meeting in the meeting room. A.must B.mustn’t C.can D.can’t 【答案】D 【详解】句意:—— 有人在敲门。是黛西吗?—— 不可能是她。她正在会议室开一个重要的会议。 考查情态动词辨析。must 必须;一定;mustn’t 禁止;can 能;可以;can’t 不可能(表示否定推测)。根据“She is having an important meeting in the meeting room.”可知,她正在开会,所以敲门的不可能是她,此处表示否定推测,应用can’t,故选D。 二.完成句子 26.(21-22八年级下·湖北宜昌·期中)高老师不可能在教室。我刚刚在操场看见她了。 Miss Gao . I just saw her in the playground. 【答案】can’t be in the classroom 【详解】根据语境可知,句子为一般现在时,本题考查情态动词can表示否定推测:不可能“can’t be”;在教室里“in the classroom”。故填can’t be in the classroom。 27.(24-25八年级下·全国·假期作业)——请你帮我洗车好吗? ——对不起,我不能。我必须去上学。 —Could you please help me wash the car? — , . I have to go to school. 【答案】 Sorry I can’t 【详解】根据汉语提示可知,此处是对could开头的一般疑问句作否定回答,应用“I can’t”;sorry“对不起”,句首首字母要大写。故填Sorry;I;can’t。 28.(24-25八年级下·全国·假期作业)——请问我能用一下你的自行车吗? ——不,你不能。我得骑车外出。 — I your bike? —No, you . I have to go out. 【答案】 Could/Can use can’t 【详解】根据中英文对照可知,第一句缺“请问我能用一下”,can“能够”,也可以用Could表示委婉语气;use“使用”,情态动词后填动词原形;第二空缺“你不能”,you can’t“你不能”。故填Could/Can;use;can’t。 29.(25-26八年级下·全国·单元测试)你最好去看牙医,可能需要拍X光片。 You should see a dentist. You an X-ray. 【答案】might need/may need 【详解】根据中英文对照可知,此处缺少“可能需要”的表达。“可能需要”可以用might need或may need来表达,might和may都表示“可能”,用于对不确定情况的推测,其中might语气更委婉,may语气相对直接,两者都符合语境;need后接名词短语“an X-ray”,符合句子结构,故填might need/may need。 30.(23-24八年级下·全国·课后作业)今天可能会下雨,因此我们最好现在就动身。 It today, so we’d better leave now. 【答案】 might/may rain 【详解】根据中英文对照可知,空缺处是“可能会下雨”,“可能会”,英文表达为may或者might,情态动词,后跟动词原形;“下雨”,英文表达为rain,动词,此处用情态动词+动词原形,作谓语。故填might/may;rain。 31.(24-25八年级下·全国·假期作业)他们现在可能在上海了。 They in Shanghai now. 【答案】 might be 【详解】根据中英文对照可知,might“可能”,情态动词,其后用动词原形;be“在”,动词。故填might;be。 32.(23-24八年级下·全国·课前预习)它们肯定非常有价值。 They really valuable. 【答案】 must be 【详解】根据所给句意可知,空白处表示“肯定是”,应用情态动词must表示推测,意为“一定”,后面be动词用原形,故填must;be。 33.(19-20八年级下·山东聊城·单元测试)他肯定在家;灯是亮着的。 He at home; the light is on. 【答案】 must be 【详解】分析句子可知,本句是主系表结构,缺系动词be的适当形式;结合下文“the light is on”和汉语提示,可知他一定在家,需用must表肯定推测;must是情态动词,后接原形动词,故填must; be。 34.(19-20八年级下·山东聊城·单元测试)你一定是个作家,对吗? You a writer, aren’t you? 【答案】 must be 【详解】根据所给汉语意思可知,应该填的是“一定”,must意为“一定”,后面接动词原形,由“a writer”是名词,所以must后用be动词原形,故填must;be。 35.(20-21八年级下·全国·课后作业)这部电影一定很受欢迎。 This movie very popular. 【答案】must be 【详解】根据中文提示,一定must,情态动词后跟动词原形;是,用be动词,故填must be。 一.语法填空 (24-25八年级下·湖南湘潭·期末)阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。 In the past few years, great changes have taken place around me. The roads 1 (use) to be dirty and crowded. People lived 3 old and small houses. The air wasn’t fresh enough. Sometimes, terrible smells filled the area. People had badly polluted the river and thrown rubbish into it. Nowadays, wide and clean roads make traveling easy for everyone. We can choose 2 (difference) kinds of transportation to go anywhere. The city has 4 (build) lots of tall buildings. So far, most of 5 (we) have moved into big and modern houses. The river has become much 6 (clean) than before, with clear water flowing through it. The blue sky and white clouds create 7 beautiful scene, and birds sing 8 (happy) . The environment in my hometown has improved greatly, 9 we still need to work together to keep it this way. Thanks to the government’s efforts, our living conditions have improved a lot recently. I’m sure as time goes by, our 10 (life) will become better and better. 【答案】1.used 2.in 3.different 4.built 5.us 6.cleaner 7.a 8.happily 9.but 10.lives 【导语】本文讲述了作者家乡过去几年在道路、居住环境、河流等方面发生的变化,以及对未来生活的展望。 1.句意:道路过去又脏又拥挤。“used to do sth.”是固定短语,意为“过去常常做某事”,此处表示道路过去的状态,所以用“used”,故填used。 2.句意:人们住在又旧又小的房子里。“live in + 地点”是固定表达,意为“住在……”,这里指住在房子里,所以用“in”,故填in。 3.句意:我们可以选择不同种类的交通方式去任何地方。kinds是名词,前面要用形容词修饰,difference的形容词形式是different“不同的”,故填different。 4.句意:这座城市已经建了很多高楼。“has+过去分词”构成现在完成时,build的过去分词是built,故填built。 5.句意:到目前为止,我们大多数人已经搬进了又大又现代的房子。of是介词,后面接人称代词宾格,故填us。 6.句意:这条河比以前干净多了,有清澈的水流过。空后是than,空处应是比较级形式,故填cleaner。 7.句意:蓝天和白云构成了一幅美丽的景色,鸟儿欢快地歌唱。scene是单数,且beautiful以辅音音素开头,这里表示“一幅美丽的景色” ,要用不定冠词“a”,故填a。 8.句意:蓝天和白云构成了一幅美丽的景色,鸟儿欢快地歌唱。sing是动词,要用副词修饰,happy的副词形式是happily,故填happily。 9.句意:我家乡的环境有了很大改善,但我们仍然需要共同努力来保持这种状态。前面说环境改善,后面说仍需努力,是转折关系,but符合语境。故填but。 10.句意:我相信随着时间的推移,我们的生活将会变得越来越好。our后面接名词复数,life“生活”的复数形式是lives,故填lives。 二.选词填空 (24-25八年级下·河南洛阳·期末)阅读短文,从方框中选择适当的词并用其正确形式填空,使短文通顺、意思完整。每空限填一词,每词限用一次。 succeed   win   famous   skill   send   but   bad   spend   try   interest Quan Hongchan, a 14-year-old girl, amazed the whole world at the Tokyo Olympic Games. She 1 the gold medal for the women’s 10-meter platform diving on August 5th. Quan is not only the youngest competitor in the women’s diving field, 2 also the youngest of 431 athletes that China 3 to Tokyo for the Olympics. In fact, she became the second-youngest Chinese diver to win a gold medal after Fu Mingxia. Quan was born in Zhanjiang. The small city is 4 for cultivating (培养) diving champions (冠军). Her parents were not rich. Things got even 5 after Quan’s mother was hit by a car on her way to work in 2017. But both of her parents were very supportive (支持) of her diving. Quan became 6 in diving when she was seven years old. Every day, she 7 almost eight hours in training basic diving 8 . She worked really hard in order to make her dream come true. Where there is a will, there is a way. Quan Hongchan is a superstar now, but she still keeps 9 hard. It’s true that she will make greater 10 in the 2024 Paris Olympic Games. 【答案】1.won 2.but 3.sent 4.famous 5.worse 6.interested 7.spent 8.skills 9.trying 10.success 【导语】本文主要讲述了14岁的全红婵在东京奥运会上赢得女子10米跳台跳水金牌的事迹。介绍了她来自以培养跳水冠军闻名的湛江,家庭虽不富裕且母亲遭遇车祸使情况更糟,但父母支持她跳水。她七岁对跳水产生兴趣,每天花大量时间训练跳水技巧。如今她成为明星仍努力训练,有望在2024年巴黎奥运会取得更大成功。 1.句意:8月5日,她赢得了女子10米跳台跳水金牌。根据“the gold medal”及“at the Tokyo Olympic Games”可知,这里说她在奥运会上赢得金牌,“win”意为“赢得”,符合语境,事情发生在过去,要用一般过去时,“win”的过去式是“won”。故填won。 2.句意:全红婵不仅是女子跳水领域最年轻的选手,也是中国派往东京参加奥运会的431名运动员中最年轻的。根据“Quan is not only the youngest competitor in the women’s diving field,...also the youngest of 431 athletes...”可知,“not only...but also...”是固定搭配,表示“不但……而且……”,连接两个并列的成分。故填but。 3.句意:全红婵不仅是女子跳水领域最年轻的选手,也是中国派往东京参加奥运会的431名运动员中最年轻的。根据“also the youngest of 431 athletes that China...to Tokyo for the Olympics.”可知,“send”意为“派遣,送”,“send...to...”表示“把……送到……”,这里说中国派运动员去东京参加奥运会,动作发生在过去,要用一般过去时,“send”的过去式是“sent”。故填sent。 4.句意:这个小城市以培养跳水冠军而闻名。根据“The small city is...for cultivating (培养) diving champion (冠军).”可知,“be famous for”是固定短语,意为“因……而闻名”,这里说湛江因培养跳水冠军出名。故填famous。 5.句意:2017年全红婵的母亲在上班路上被车撞后,情况变得更糟了。根据“Things got even...after Quan’s mother was hit by a car on her way to work in 2017.”可知,“even”常用来修饰比较级,表示程度上“更……”,“bad”的比较级是“worse”,表示情况变得更差。故填worse。 6.句意:全红婵七岁时就对跳水产生了兴趣。根据“Quan became...in diving when she was seven years old.”可知,“become interested in”是固定短语,意为“对……感兴趣”,这里说全红婵对跳水感兴趣。故填interested。 7.句意:每天,她几乎花八个小时训练基本跳水技巧。根据“Every day, she...almost eight hours in training basic diving...”可知,“spend time (in) doing sth.”是固定用法,表示“花费时间做某事”,这里说她花费时间训练,事情发生在过去,要用一般过去时,“spend”的过去式是“spent”。故填spent。 8.句意:每天,她几乎花八个小时训练基本跳水技巧。根据“Every day, she spent almost eight hours in training basic diving...”可知,此处表示跳水“技巧”,“skill”意为“技巧,技能”,是可数名词,跳水技巧不止一个,要用复数形式“skills”。故填skills。 9.句意:全红婵现在是超级明星了,但她仍然坚持努力尝试。根据“Quan Hongchan is a super star now, but she still keeps...hard.”可知,“keep doing sth.”是固定用法,表示“持续做某事,坚持做某事”;“try hard”表示“努力尝试”,符合语境,所以这里要用“try”的动名词形式“trying”。故填trying。 10.句意:她在2024年巴黎奥运会上一定会取得更大的成功。根据“It’s true that she will make greater...in the 2024 Paris Olympic Games.”可知,“make success”表示“取得成功”,“greater”是“great”的比较级,修饰名词“success”,表示“更大的成功”,符合语境。故填success。 1 / 12 学科网(北京)股份有限公司 $

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Unit 4  Helping out表示“可能性与推测”的常用情态动词(单元核心语法精练)英语新教材外研版八年级下册
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Unit 4  Helping out表示“可能性与推测”的常用情态动词(单元核心语法精练)英语新教材外研版八年级下册
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Unit 4  Helping out表示“可能性与推测”的常用情态动词(单元核心语法精练)英语新教材外研版八年级下册
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