资源简介 / 让学习更有效 新课备课备考 | 英语学科/ 让学习更有效 新课备课备考 | 英语学科2025年牛津译林版九年级英语上册精讲精练Unit 3 Teenage problems核心语法:情态动词(should、could和might)一、核心概念情态动词(Modal Verbs)表示说话人的态度、推测或可能性,后接动词原形。本单元重点掌握should、could、might的用法。二、三大情态动词深度解析1. should 的用法功能 例句 注意事项义务/责任 You should finish homework on time. 比must语气温和建议 You should see a doctor. 可与ought to互换推测 They should arrive by 5pm. 表示较大可能性虚拟语气 Should you need help, call me. 倒装表条件2. could 的用法功能 例句 注意事项过去能力 I could swim at age 5. 相当于was able to委婉请求 Could you pass me the salt 比can更礼貌可能性 It could rain tomorrow. 可能性低于may虚拟语气 If I had time, I could help. 表非真实情况3. might 的用法功能 例句 注意事项较小可能性 She might come later. 可能性低于may委婉许可 Might I borrow your pen 极正式场合使用虚拟语气 If you tried, you might succeed. 表假设结果三、易混淆点对比1. should vs. could vs. might 表示可能性情态动词 可能性程度 例句should 80%可能性 The package should arrive today.could 50%可能性 The weather could get worse.might 30%可能性 He might forget the meeting.2. could的两种时态功能过去时:表示过去能力(=was/were able to)When young, I could climb trees.现在时:表示委婉请求或可能性Could you do me a favor 四、特殊句型结构1. should have done 结构表示"本应该做而未做":You should have told me earlier.(你本应该早点告诉我)2. could/might have done 结构表示"过去可能发生但未发生":She could have passed the exam if she had studied.3. 疑问句中的情态动词Should I wear formal clothes (需要穿正装吗?)Might I ask a question (我可以提问吗?)五、常见错误及纠正1. should与must混淆 You must apologize.(语气过强) You should apologize.(建议性语气)2. could表示过去能力的误用 Yesterday I could finish the work.(未完成) Yesterday I was able to finish the work.3. might的过度使用 Might you help me (过于正式) Could you help me (日常用语)1.—________ I borrow some books from you —Of course.A.Could B.Can C.A or B2.My little sister ________ ride bikes at the age of four.A.should B.couldC.had to D.need3.— Could I keep the windows ________ There are too many people in the room.— Of course you ________. It is important to let the fresh air in.A.open; could B.closed; can C.open; can D.closed; could4.—Excuse me, ________ you show me the way to the Jiajia Hotel —Sorry, I am new here.A.should B.must C.could D.may5.—David, ________ you please sweep the floor and take out the trash —OK, Mum.A.could B.may C.should D.must6.—________ I speak to Teng Fei —Sorry, he’s not in.A.Could B.Must C.Should7.Eating too much salt or sugar ________ cause illness.A.should B.must C.might D.have to8.—________ you take care of my cat I’m going on a business trip.—Of course. I love cats.A.Could B.Should C.Must D.Need9.—________ I borrow your knives —Sorry, you ________. I lent them to Sandy.A.May; can B.Can; could C.Could; can’t D.Could; couldn’t10.—Could I borrow your pen —Sorry, you _______. Mike is using it.A.can’t B.shouldn’t C.mustn’t D.needn’t11.________ you open the door for me I am carrying too many things.A.Must B.May C.Need D.Could12.—I don’t care what people think.—Well, you __________. You’re not alone in this world.A.can B.may C.should D.will13.— Is the woman over there our new English teacher —Well, she ________ be, but I’m not quite sure.A.must B.might C.can D.need14.—________ I play soccer after finishing my homework —Of course.A.Could B.Must C.Need D.Will15.Earthquakes can be very dangerous. We ________ learn to protect ourselves.A.might B.should C.could D.would16.—I have a toothache.—Maybe you ________ see a dentist.A.shouldn’t B.needn’t C.would D.should17.Mike ______ want to go with me, but I'm not sure.A.might B.must C.can D.can't18.I_________ go to America to visit you if I have free time next year.A.might B.need C.might not D.needn’t19.—I’ve got a toothache, Mum.—Oh, you ________ eat too many sweet snacks.A.shouldn’t B.needn’t C.should D.need20.—Shall we go now —No. Mr. Henderson said that all of us _________ remain in our seats until all the reports have been collected.A.could B.might C.would D.should21.You should ________ more water when you have a fever.A.drinks B.drinking C.drinked D.drink22.—How is your tour around the lake Is it beautiful —It ________ be, but it is now seriously polluted.A.should B.might C.must D.can23.—Whose English book is this —It _______ be Lily’s, but I’m not sure.A.might B.can’t C.must24.— What do you plan to do this winter holiday, Betty — I’m not sure, but I ________ go to the museum.A.might B.must C.can D.mustn’t25.I want ________ the house. Could you ________ me A.clean; help B.to clean; help C.to clean; to D.cleaning; to help26.—Excuse me, but we ________ wait in line to get on the subway.—I’m sorry.A.might B.would C.could D.should27.—______ you send (邮寄) the letter for me —OK.A.Could B.Must C.May D.Should28.—What will the weather be like tomorrow —It be rainy, cloudy or sunny. I’m not sure.A.must B.should C.can’t D.might29.We ________ keep quiet in the hospital. It’s one of the hospital rules.A.should B.may C.can D.would30.We shouldn’t always talk about the problem. We should ________ at once.A.look out B.take action C.wait for D.actions31.—I have a stomachache. What should I do —You ________ drink cold water and ________ eat cold food.A.had better not; shouldn’t B.should; had better C.shouldn’t; should32.A country has dreams. We teenagers ________ also have dreams. With dreams and hard work, anything amazing can be created.A.may B.must C.should33.Could you please ________ all the food A.to eat B.not to eat C.not eat D.not eating34.—Some people don’t show their talents (天赋) at the very beginning.—Exactly. Even Einstein _________ speak until he was three.A.mustn’t B.can’t C.couldn’t D.needn’t35.To keep children safe, we put the things like knives and medicine away in our house.A.may B.should C.can36.It’s cold. You ________ put on your sweater before going out.A.should B.can C.may D.would37.During the Tang dynasty (唐朝), nearly everything produced in the world ________ on the streets of Chang’an.A.is found B.has been found C.will be found D.could be found38.You ________ play football in the classroom.A.mustn’t B.should C.must D.shouldn’t39.—David, _________ you please sweep the floor and take out the rubbish —OK, I am coming.A.could B.should C.do D.will40.—Must I hand in my book report today, Mr Brown —No, you _________ . The book report is due in two weeks.A.can’t B.mustn’t C.shouldn’t D.needn’t41.—When Monday I’m afraid Monday ________ be a problem for me.—But why I know you are free on Monday.A.need B.needn’t C.might not D.might42.—________ I use your dictionary —Yes, of course you ________.A.Could; must B.Could; can C.Need; could43.—Jack, could you please help me take out the trash —Sorry, ________, mom. I ________ my homework now.A.couldn’t, am doing B.can’t, am doing C.can’t, do44.Bob ________ play basketball at all two years ago, but now he ________ do it well.A.could; can’t B.could; can C.couldn’t; can’t D.couldn’t; can45.It’s necessary that we ________ wear sports shoes when we have P.E. classes.A.will B.may C.should D.can46.—His father is a good cooker.—That ________ be cook.A.may B.should C.must D.had better47.—Listen! Is Bruce singing in the class —It ________ be him. But I’m not sure.A.need B.couldC.must D.would48.You are not allowed to play with fire in the forest. It ________kill plants, animals and even people.A.might B.might not C.should D.should not49.To make our dream come true, we ________ rest on what we have done.A.may not B.should not C.need not D.could not50.We ________ try our best to fight against pollution.A.should B.may C.mustn’t D.needn’t51.—Excuse me, ________ you please tell me where I can post a letter —________. Turn left. There is a post office on Fifth Road.A.could; Sure B.could; Sorry C.will; Sounds great D.will; Good idea52.—Why didn’t you come to the meeting yesterday —I ________ come because I was sick.A.may not B.mustn’t C.couldn’t D.shouldn’t53.The boy ________ ride a horse when he was eight years old.A.must B.could C.would D.may54.When our parents become too old to take care of themselves one day, we ________ look after them well.A.should B.shouldn’t C.may D.may not55.—Many people play with mobile phones all day instead of reading books.—That’s too bad. Everyone ________ be a book lover. Reading is more enjoyable.A.may B.should C.would D.need56.—________ you please help me look for my English book I can’t find it anywhere.—With pleasure.A.Should B.MustC.Might D.Could57.It’s already half past seven. You ______ get up quickly.A.could B.should C.won’t D.shouldn’t58.We __________ carry forward the spirit of serving the people whole-heartedly.A.might B.should C.could D.can’t59.Sara _________ a stomachache. So she _________ eat the ice-cream.A.has; shouldn’t B.has; should C.have; shouldn’t60.—Could you please buy some drinks and snacks —________. I don’t have any money.A.No, I couldn’t B.Sorry, I can’t C.Yes, sure D.No way61.You ________ ask your friends for help if you don’t know how to work out the math problem.A.could B.wouldC.must D.might62.—I didn’t wear enough warm clothes yesterday. Now I have a cold.—I’m sorry to hear that. I think you _______ lie down and rest.A.mustn’t B.should C.shouldn’t D.would63.—________ Alice dance the disco two years ago —No, she ________. But now she ________.A.Can; can’t; could B.Could; couldn’t; can C.Could; couldn’t; could D.Can; couldn’t; can64.I ________ buy the recorder because I had no money with me then.A.can B.cannot C.could D.couldn’t65.Mario, you ________copy others’ homework. It’s not good for your study.A.needn’t B.shouldn’t C.must D.can66.You ________ clean the blackboard because you are on duty.A.must B.should C.can D.may67.—I have problems with my English writing. What ________ I do —You can start with learning simple sentences (句子).A.should B.must C.might D.would68.—What will the weather be like tomorrow —It ________ be windy or rainy. It always changes quickly.A.must B.might C.can’t D.shouldn’t69.—Jessica, it’s raining hard outside.—Oh, you ______ be careful when you drive to work.A.should B.will C.can D.might70.Could you ________ the window I feel a little cold.A.please not to open B.please not openC.not please to open D.not please to close71.—What are you going to do this weekend, Xiaoming —I’m not sure. I ________ visit my grandparents in the countryside.A.must B.shouldC.might D.will72.—Whose notebook is this —It ________ be Alan’s. It looks like his.A.must B.can’t C.might D.mustn’t73.—Mum, I want some snacks, not the sandwich!—My dear, don’t forget that you ________ fall ill without eating much unhealthy food last week.A.may B.must C.couldn’t D.shouldn’t74.—Lily is intelligent and hard-working, she ________ do well in the singing competition.—Sure. She was born to be a singer.A.should B.might C.can’t75.—How was the youth club last night, Simon —It was great fun. You ________ come.A.should B.can C.must D.ought/ 让学习更有效 新课备课备考 | 英语学科/ 让学习更有效 新课备课备考 | 英语学科21世纪教育网(www.21cnjy.com)21世纪教育网(www.21cnjy.com)参考答案及试题解析1.C【解析】句意:——我可以向你借几本书吗?——当然。考查情态动词。could能;can能。根据题干可知,此处是表示请求允许,用could和can都可以,故选C。2.B【解析】句意:我妹妹四岁的时候会骑自行车。考查情态动词辨析;should应该;could能够;had to不得不;need需要。根据“My little sister...ride bikes at the age of four.”可知,此处是对能力的描述,could符合题意。故选B。3.C【解析】句意:——我可以把窗户开着吗?房间里人太多了。——当然可以。让新鲜空气进来很重要。考查形容词作宾补和情态动词。open开着的;closed关着的;can能,可以;could是can的过去式。根据句意“It is important to let the fresh air in”可知,这里是让窗户开着,排除B和D;could用来表示语气委婉,答语中用can。故选C。4.C【解析】句意:——打扰一下,您能告诉我到佳佳酒店的路吗?——抱歉,我是新来的。考查情态动词的用法。should应该;must必须;could能够,常用于礼貌地请求帮助;may可能。根据语境,此处是礼貌地请求对方帮助,故选用could。故选C。5.A【解析】句意:——戴维,请你扫下地,把垃圾倒出去好吗?——好的,妈妈。考查情态动词辨析。could可以,和please连用表委婉语气;may可以;should应该;must必须。根据题干“…you please sweep the floor and take out the trash”,可知是请求允许,需用“Could you please…”表委婉语气,故选A。6.A【解析】句意:——我可以和滕飞说话吗?——抱歉,他不在。考查情态动词辨析。Could可以;Must必须;Should应该。根据“...I speak to Teng Fei ”可知,此处考查打电话用语:Could I speak to... “我可以和……说话吗?”。故选A。7.C【解析】句意:吃太多的盐或糖可能会导致疾病。考查情态动词。should应该;must必须(主观);might可以;have to不得不(客观);根据“吃太多的盐或糖”与“导致疾病”,可推测出应用“可能”,所以此处用 might,符合题意。故选C。8.A【解析】句意:——你能照顾我的猫吗?我要出差了。——当然可以。我喜欢猫。考查情态动词。Could能,可以;Should应该;Must必须;Need需要。根据“you take care of my cat I’m going on a business trip.”可知,此处表示委婉的请求,用Could。故选A。9.C【解析】句意:——我可以跟你借刀子吗?——抱歉,你借不了。我把它们借给桑迪了。考查动词辨析。May可以;Can可以;Could可以;can’t不可以;couldn’t不可以。根据“…I borrow your knives ”可知此处表示请求许可,可用may或could比can更加委婉客气,其肯定回答用may或can,否定回答用can’t;根据“Sorry”可知此处应为否定回答,用can’t。故选C。10.A【解析】句意:——我可以借你的笔吗?——对不起,你不能。Mike正在用。考查一般疑问句的回答。“Could I borrow your pen ”表示委婉的请求,回答时用can来回答,肯定回答用can,否定回答用can’t,根据“Mike is using it.”可知,是不能借,因此作否定回答。故选A。11.D【解析】句意:你能帮我把门打开吗?我拿了太多东西。考查情态动词。Must必须;May可以;Need需要;Could能够。表示请求时一般用“Could you … ” Could意为 “能够”,表示婉转的请求。故选D。12.C【解析】句意:——我不在意人们的看法。——嗯,你应该在意。在这个世界上你不是孤立的人。考查情态动词。can能;may可以,也许;should应该;will将。根据“You’re not alone in this world”可知句子表达建议他“应该在意人们的看法”,用情态动词should。故选C。13.B【解析】——那里的那个女人是我们的新英语老师吗? ——好吧,她可能是,但是我不是很确定。考查情态动词辨析。must 一定,必须;might可能;can可以,会;need需要。根据“but I’m not quite sure”可知,此处表示不确定,might可能符合题意。故选B。14.A【解析】句意:——完成家庭作业之后,我可以踢足球吗?——当然。考查情态动词。Could可以,表委婉礼貌的请求;Must必须;Need需要;Will将要。根据语境和“Of course”可知,问句表示请求。故选A。15.B【解析】句意:地震可能非常危险。我们应该学会保护自己。考查情态动词。might可能;should应该;could能;would将。根据“We...learn to protect ourselves.”可知此处是表示建议,我们应该学会保护自己,故选B。16.D【解析】句意:——我牙疼。——也许你应该去看牙医。考查情态动词辨析。shouldn’t不应该;needn’t不必要;would将会;should应该。根据“I have a toothache.”和“Maybe you ...see a dentist.”可知,此处表示你应该去看牙医,should表示建议。故选D。17.A【解析】句意:迈克可能想和我一起去,但是我不确定。考查情态动词。might可能;must必须;can能够;can’t不能,不可能。根据“but I'm not sure”可知表述不确定的推测,用might表述可能性。故选A。18.A【解析】句意:如果明年我有时间,我可能会去美国看你。考查情态动词。might可能;need需要;might not可能不;needn’t不必。根据“if I have free time next year”可知有时间的话可能回去,用might表示不确定的肯定推测。故选A。19.A【解析】句意:——我牙痛,妈妈。——哦,你不应该吃太多甜食。考查情态动词。shouldn’t不应该;needn’t不必;should应该;need需要。根据“I’ve got a toothache, Mum.”可知吃太多甜食引发了牙痛,不应该吃太多。故选A。20.D【解析】句意:——我们现在能走了吗?——不。Henderson先生说在所有的报告收集完毕之前,我们都应该留在座位上。考查情态动词。could可以;might可能;would会;should应该。根据“Mr. Henderson said that all of us…remain in our seats until all the reports have been collected.”可知,此处是应该留在座位上,应用should。故选D。21.D【解析】句意:你发烧时应该多喝水。考查情态动词should的用法。should “应该”,是情态动词,后面接动词原形。故选D。22.A【解析】句意:——你的环湖之旅怎么样?它漂亮吗?——它应该是(漂亮的),但现在它被严重污染。考查情态动词辨析。should应该;might可能;must一定;can能。根据“but it is now seriously polluted.”可知,它应该是美丽的。故选A。23.A【解析】句意:——这是谁的英语书?——可能是莉莉的,但我不确定。考查情态动词。might可能;can’t不可能;must一定;结合“but I’m not sure.”可知,此处是一种不确定的推测,应用might,故选A。24.A【解析】句意:——贝蒂,这个寒假你打算做什么?——我不确定,但是我可能去博物馆。考查情态动词。might可能;must必须;can能;mustn’t禁止。根据“I’m not sure”可知,空处表示不确定推测,所以用might,故选A。25.B【解析】句意:我想打扫房子。你能帮助我吗?考查不定式以及情态动词could的用法。第一空考查固定短语want to do sth.“想要做某事”,空处要填不定式to clean,排除A、D;第二空应填动词,且情态动词Could后的动词要用原形,排除C。故选B。26.D【解析】句意:——对不起,我们应该排队上地铁。——我很抱歉。考查情态动词辨析。might可以;would将;could可以;should应该。根据“but we …wait in line to get on the subway”可知,应该排队上地铁,故选D。27.A【解析】句意:——你能把信邮寄给我吗?——好的。考查情态动词。could能;must必须;may可能;should应该。根据“you send (邮寄) the letter for me”可知此处是请求允许,用结构could you do sth.“你能做某事吗”。故选A。28.D【解析】句意:——明天天气怎么样?——可能是下雨,多云或晴天。我不确定。考查情态动词。must必须;should应该;can’t不能;might可能。根据“I’m not sure”可知,不太确定,可能是下雨,也可能是多云或晴天,故选D。29.A【解析】句意:我们在医院应该保持安静。这是医院的规则之一。考查情态动词。should应该;may可能;can能够;would将。根据“It’s one of the hospital rules.”可知,我们应该遵守医院的规则,故选A。30.B【解析】句意:我们不应该总是谈论问题。我们应该立刻行动。考查动词短语辨析。look out当心;take action采取行动;wait for等待;actions行动,名词。根据“We shouldn’t always talk about the problem.”可知应是不能只是讨论问题,而应该付诸行动,而should“应该”情态动词,后续动词原形,故选B。31.A【解析】句意:——我胃疼。我应该做什么?——你最好不要喝冷水,并且不应该吃凉的食物。考查情态动词。had better最好;should应该。根据“I have a stomachache.”以及常识可知,胃疼不能喝冷水也不能吃凉的食物,因此第一空和第二空都应该填否定意义的词,had better not“最好不”,shouldn’t“不应该”,只有A符合语境。故选A。32.C【解析】句意:一个国家有梦想。我们青少年也应该有梦想。有了梦想并努力工作,我们可以创造任何惊人的事情。考查情态动词辨析。may可能;must必须;should应该。根据“A country has dreams.”可知,此处指国家有梦想,那么青少年也应该有梦想。故选C。33.C【解析】句意:你能不能不要把食物都吃了?考查固定句式。Could you please not do sth 表示“你可以不要做某事吗”,故选C。34.C【解析】句意:——一些人在最初的时候没有展示出他们的天赋。——正是如此。甚至爱因斯坦也是直到3岁才会说话。考查情态动词辨析。mustn’t禁止;can’t表示现在不能;couldn’t表示过去不能;needn’t不必。根据“Even Einstein…speak until he was three.”可知,此处指的是他三岁的时候不会说话,用过去式couldn’t,故选C。35.B【解析】句意:为了保护孩子们的安全,我们应该把刀和药之类的东西在家里收拾好。考查情态动词辨析。may可以;should应该;can能够;根据“To keep children safe”可知是保护孩子们安全,可推测出此处是一种责任,应用should,故选B。36.A【解析】句意:天气很冷。你应该在外出去前穿上毛衣。考查情态动词辨析。should 应该;can 能够;may 可能;would 将会。根据“It’s cold.”可知,此处是因为天冷,故建议穿上毛衣。故选A。37.D【解析】句意:在唐朝,在长安的街道上几乎可以找到世界上所有的东西。考查时态和语态。主语“nearly everything produced in the world”与动词find之间是动宾关系,此处表示能够被找到,结合“During the Tang dynasty”可知用过去式could表示“能够”,此处是含情态动词的被动语态,用could be found。故选D。38.D【解析】句意:你不应该在教室里踢足球。考查情态动词的用法。mustn’t禁止,不准;should应该;must必须;shouldn’t不应该。根据“You...play football in the classroom.”可知,此处劝告对方不该在教室里踢足球,而非强制禁止。故选D。39.A【解析】句意:——大卫,你能扫扫地,倒倒垃圾吗?——好的,我来了。考查情态动词的用法。could能;should应该;do做;will将。根据“you please sweep the floor and take out the rubbish”可知,这是一个表示请求允许的句子,用固定句式“could you please do sth”。故选A。40.D【解析】句意:——我必须在今天上交读书报告吗,布朗老师?——不,你不必。考查情态动词辨析。can’t不能;mustn’t禁止;shouldn’t不应当;needn’t不必。回答以must 开头的一般疑问句时,否定回答常用needn’t,表示不必。故选D。41.D【解析】句意:——什么时候?星期一?恐怕星期一对我来说可能是个问题。——但是为什么?我知道你星期一有空。考查情态动词。need需要;needn’t不需要;might not可能不;might可能。根据“I’m afraid Monday...be a problem for me.”可知,此处指恐怕星期一可能没空,故用might。故选D。42.B【解析】句意:——我可以用一下你的字典吗?——是的,当然可以。考查情态动词。could可以;must必须;can可以;need需要。“Could I... ”是一种比较委婉、客气的请求句式,比“Can I... ”更有礼貌、更委婉的语气,用来询问“我可以……吗?”;当用“Could I... ” 来提问表示请求时,肯定回答常用“Yes, you can.”,表示许可。故选B。43.B【解析】句意:——杰克,你能帮我倒垃圾吗?——对不起,我不能,妈妈。我现在正在做作业。考查情态动词及动词时态。对“could you please…”的肯定回答是Yes, I can,否定回答是Sorry, I can’t。根据“now”可知,“我”现在正在做作业,应为现在进行时。故选B。44.D【解析】句意:两年前鲍勃一点也不会打篮球,但是现在他能打得很好。考查情态动词。could可能,是can的过去式;couldn’t不可能,是can’t的过去式;can能;can’t不可能。not…at all“一点也不”,第一空根据“two years ago”可知,此处用一般过去时,因此用couldn’t;第二空根据“now”可知,此处用一般现在时,连词but前后表示转折关系,but前表示他不会打篮球,but后表示他打得非常好,因此用情态动词can,故选D。45.C【解析】句意:我们上体育课时穿运动鞋是有必要的。考查动词辨析。will会;may也许,可能;should应该;can能。根据“we…wear sports shoes when we have P.E. classes”可知,此处表示“应该穿运动鞋”,故选C。46.B【解析】句意:——他的父亲是一个好厨具。——那应该是厨师。考查情态动词辨析。may也许;should应该;must必须;had better最好。根据“His father is a good cooker.”可知,此处表达有误,应说“应该是厨师”,用should。故选B。47.B【解析】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。48.A【解析】句意:不准在森林里玩火。它可能会杀死植物、动物甚至人类。本题考查情态动词。might可能,表示推测;might not可能不,表示推测;should应该,表示建议;should not不应该,表示建议。根据You are not allowed to play with fire in the forest. 可知,在森林里不可以玩火,因此推测可能会杀死植物、动物或人。故选A。49.B【解析】句意:为了实现我们的梦想,我们不应该停留在我们做过的事情上。考查情态动词。may not可能不;should not不应该;need not不必;could not不能。根据“rest on what we have done.”可知是不应该停留在已经做过的事情上。故选B。50.A【解析】句意:我们应该尽力与污染作斗争。考查情态动词辨析。should应该;may也许;mustn’t禁止;needn’t不必。分析“We…try our best to fight against pollution.”可知,此处强调义务,“应该”符合语境,故选A。51.A【解析】句意:——打搅一下,你可以告诉我在哪里可以寄信吗 ——当然,向左转。在第五路上有一个邮局。考查could的用法和情景交际。could可以;will将要,会;Sure当然;Sorry抱歉;Sounds great听起来很棒; Good idea好主意。根据“...you please tell me where I can post a letter”可知,此处是问路,表示委婉语气用could。根据“Turn left. There is a post office on Fifth Road.”可知,回答者愿意帮忙,因此“sure (当然)” 符合语境。故选A。52.C【解析】句意:——你昨天为什么没来开会?——我因为生病不能来。考查动词辨析。may not可能不;mustn’t禁止;couldn’t不能;shouldn’t不应该。根据“because I was sick.”可知是因为生病不能来。故选C。53.B【解析】句意:这个男孩八岁时就能骑马。考查情态动词。must必须;could能够;would将会;may可以。根据“when he was eight years old”可知八岁时能够骑马,用一般过去时,此处用could。故选B。54.A【解析】句意:当我们的父母有一天变得太老而不能照顾自己时,我们应该好好照顾他们。考查情态动词。should应该;shouldn’t不应该;may可能;may not可能不。根据“When our parents become too old to take care of themselves one day”可知,当父母老去那一天,我们应该照顾他们,这是我们的责任和义务,故应用“应该”should。故选A。55.B【解析】句意:——很多人全天都是在玩手机而不是读书。——那太糟糕了。每个人都应该是书籍爱好者。读书真的很令人愉快。考查情态动词辨析。may或许;should应该;would将要;need需要。根据“Reading is more enjoyable”可知,读书是令人很愉快的一件事,建议人们应该是读书爱好者。故选B。56.D【解析】句意:——你能帮我找一下我的英语书吗?我到处都找不到。——愿意效劳。本题考查情态动词。Should应该;Must 必须;Might 可能;Could 能,可以。根据“you please help me look for my English book ”可知,此处表示请求,句型是Could you please...。故选D。57.B【解析】句意:已经七点半了。你应该快点起床。考查情态动词。could可以;should应该;won’t将不会;shouldn’t不应该。根据“It’s already half past seven.”可知,这里是你应该快点起床。故选B。58.B【解析】句意:我们应该发扬全心全意为人民服务的精神。考查情态动词辨析。might可能;should应该;could可能,能够;can’t不能。根据“We...carry forward the spirit of serving the people whole-heartedly.”可知,应该发扬这种精神,用should表示责任和义务,故选B。59.A【解析】句意:萨拉胃疼。所以她不应该吃冰淇淋。考查主谓一致及情态动词。根据“Sara”可知,空一处主语是三单,动词用三单has;根据“Sara ... a stomachache.”可知,胃疼不应该吃冰淇淋,空二处用shouldn’t。故选A。60.B【解析】句意:——你能买些饮料和零食吗?——对不起,我不能。我没有钱。考查一般疑问句。No, I couldn’t不,不能;Sorry, I can’t对不起,我不能;Yes, sure是的,当然可以;No way没门。根据“I don’t have any money.”可知,应用否定回答,could表示委婉语气,所以用can’t回答,故选B。61.A【解析】句意:如果你不知道怎么解这道数学题,你可以向你的朋友寻求帮助。考查情态动词。could可以;would将;must必须;might可能。根据“ask your friends for help if you don’t know how to work out the math problem.”可知不知道怎么解这道数学题,可以向你的朋友寻求帮助。故选A。62.B【解析】句意:——昨天我没有穿足够暖和的衣服。现在我感冒了。——听到这个消息我很难过。我想你应该躺下休息。考查情态动词。mustn't禁止;should应该;shouldn't不应该;would将要;根据“I didn’t wear enough warm clothes yesterday. Now I have a cold.”以及“lie down and rest”可知,此处是建议对方躺下休息,用should提出建议,表示“应该”,故选B。63.B【解析】句意:——Alice两年前能跳迪斯科吗?——不,她不会。但是现在她会。考查时态辨析及一般疑问句的回答。根据“two years ago”可知问句及其否定回答都用一般过去时,第一空用Could,第二空用couldn’t;再由“But now”可知最后一句用一般现在时,can用原形。故选B。64.D【解析】句意:那时我买不了录音机,因为我身上没有钱。考查情态动词。can“能”;cannot“不能”;could“能”,过去式;couldn’t“不能”,过去式。当can表示能力时,过去式是could。根据“because I had no money with me then.”可知,没有钱,买不了录音机,且由“had”可知是一般过去时。故选D。65.B【解析】句意:马里奥,你不应该抄别人的作业。这对你的学习不好。考查情态动词辨析。needn’t不需要;shouldn’t不应该;must必须;can能,会。根据“It’s not good for your study.”可知,不应该抄别人的作业。故选B。66.B【解析】句意:你应该擦黑板,因为你值日。考查情态动词辨析。must一定,必须;should应该;can能,会;may也许,可能。 根据“because you are on duty”可知,此处表示应该。故选B。67.A【解析】句意:——我的英语写作有问题。我该怎么办?——你可以从学习简单的句子开始。考查情态动词辨析。should应该;must必须;might可能;would将。根据下面的答句“You can start with learning simple sentences .”可知,是在问“我该怎么做”,寻求建议。故选A。68.B【解析】句意:——明天的天气会怎样?——可能刮风或下雨。它总是变化很快。考查情态动词。must必须;might可能;can’t不可能;shouldn’t不应该。根据“It ... be windy or rainy. It always changes quickly.”可知,不确定天气是有风还是有雨,此处表示不确定的推测。故选B。69.A【解析】句意:——-杰西卡,外面雨下得很大。——哦,你开车去上班的时候要小心。考查情态动词,should应该;will将;can能;might也许。根据“…be careful when you drive to work.”可知是应该小心一点。故选A。70.B【解析】句意:请不要开窗户好吗?我有点感冒了。考查动词词义以及特殊疑问句。open打开;close关闭,根据could you please not do sth“请不要……好吗?”和“I feel a little cold”可知,应该是请不要开窗户好吗,故选B。71.C【解析】句意:——小明,这个周末你打算做什么?——我不确定。我可能会去乡下看望我的祖父母。考查情态动词。must必须、一定;should应该;might“可能”;will“将要”。根据前面的“I’m not sure”可知,对于做什么事是不确定的,空处填might符合。故选C。72.C【解析】句意:——这是谁的笔记本?——它可能是艾伦的。看起来像他的。考查情态动词表推测。must一定;can’t不可能;might可能;mustn’t表禁止。根据“It looks like his.”可知,笔记本看起来像是艾伦的,表不确定的推测,故用might。故选C。73.C【解析】句意:——妈妈,我要吃零食,不要三明治!——亲爱的,别忘了上周不吃很多不健康的食物你是不会生病的。考查情态动词。may可能;must必须;couldn’t不能,不会;shouldn’t不应该。根据“fall ill without eating much unhealthy food”可知不吃不健康食物就不会生病,用couldn’t。故选C。74.A【解析】句意:——莉莉聪明又勤奋,她应该在歌唱比赛中取得好成绩。——当然。她天生是个歌唱家。考查情态动词。should应该;might可能;can't不可能。根据答句“Sure. She was born to be a singer.”讲到Lily是天生的歌唱家,可知此处表示肯定的推测,排除C。might表示推测时可能性非常小,而should表推测时讲话人是根据自己了解的情况和判断,试探性地得出结论,有“按理应当,估计”的含义。根据题干中“Lily is intelligent and hard-working”可知这里是根据自己了解的情况而做出的推测,用should而不用might。故选A。75.A【解析】句意:——西蒙,昨晚的青年俱乐部怎么样? ——非常有趣。你应该来。考查情态动词。should应该;can可以;must必须;ought应该去做。ought to=should,也就是说ought to可以看成情态动词,ought不是情态动词。根据“It was great fun.”可知,这里是你应该来,排除D。故选A。21世纪教育网(www.21cnjy.com)21世纪教育网(www.21cnjy.com) 展开更多...... 收起↑ 资源预览