(易错题精选)初中英语语法知识—情态动词的图文答案
初中英语语法之情态动词用法及练习题(含答案)
情态动词用法及练习题一、情态动词的概念：情态动词主要用以表明说话者对某一行为的态度和观点，主要包括揣测、判断、需要及各种意愿。
常见的情态动词有can、may、could、must、have to、should、would等。
二、情态动词的特征(1)情态动词本身有词义，但词义不完整，因此不能独立作谓语，只能和主要动词一起构成谓语。
例如：I can play the piano.（ can play整体为谓语）(2)其后动词使用原形。
例如：You should lie down.(3)情态动词一般没有人称和数的变化(即不管是何人称，后面接的情态动词都不变)。
例如：I/She can sing.(4)它的否定式一般是在其后加 not构成，在一般疑问句中通常将其提到句首。
结构如下：①肯定句：主语+情态动词+动词原形+其他。
例如：He can swim.②否定句：主语+情态动词+not+动词原形+其他。
例如：He can't swim.③一般疑问句：情态动词+主语+动词原形+其他？Yes，主语+情态动词. No,主语+情态动词+not.例如：-Can he swim?-Yes, he can. No,he can’t.④特殊疑问句：特殊疑问词+情态动词+主语+动词原形+其他? 例如： -What can he do ?-He can swim.三.情态动词的用法(1)can的用法①表示“能力”Can you sing?你会唱歌吗?②表示客观条件允许You can listen to music here.你可以在这里听音乐。
You can’t park your car here. 你不能在此停车③can用在否定句和疑问句中时，有时表示说话人的怀疑、惊异、或猜测：It can’t be true.这不可能是事实Can it be true?这可能是真的吗？④.can的搭配用法：A.as +adj./adv.+as one can/could “尽可能，尽量……”，如：The man took his child to the hospital as quickly as he could.这个男人尽可能快地将孩子送去医院。
初中情态动词知识点及习题(附答案)
初中情态动词讲解及练习题情态动词表示语气和态度。
有实际词义，但是没有单复数等词形变化。
后面通常加动词原形中考主要考查can，must，may，need四个情态动词。
除此之外，表示必要性的情态动词还有should，应该，这个语气比must弱，还有易考点：一．比较have to和must：1) 两词都是'必须'的意思，have to表示客观的需要，must 表示说话人主观上的看法，既主观上的必要。
My brother was very ill, so I had to call the doctor in the middle of the night.我弟弟病得很厉害，我只得半夜里把医生请来。
(客观上需要做这件事)He said that they must work hard.他说他们必须努力工作。
（主观上要做这件事）2) 在否定结构中：don't have to 表示"不必" mustn't表示"禁止"，You don't have to tell him about it. 你不一定要把此事告诉他。
You mustn't tell him about it. 你一定不要把这件事告诉他。
二．肯定句中，表示推测，语气最强的是must，但在否定句和疑问句中，表示怀疑，猜测，要用can’t. （mustn’t禁止，不允许，不能用来表推测；can’t 不可能）There is someone knocking the door. It must be Tom.It can’t be Tom in the classroom. Because he is ill and he doesn’t come to school today.三．情态动词的回答1. 以can开头的一般疑问句，其肯定和否定回答分别用：can和can’t。
(专题精选)初中英语语法知识—情态动词的易错题汇编及答案
一、选择题1．—The book report is very important. You ________ write it carefully.—But I ________ hand it in now.A．must; must B．have to; mustC．must; have to D．have to; have to2．— Do you think it is safe to shop online?— I think so. On Taobao, customers return goods with no questions asked，but they ______ pay delivery costs.A．can’t; can B．must; must C．can; have to D．mustn’t; can 3．―I can't stop smoking, Doctor.―For your health, I'm afraid you .A．must B．can C．need D．have to4．―I didn’t pass the driving test again.―Don't worry. Just like the weather, life be beautiful all the time.A．can't B．needn't C．shouldn't D．mustn't5．You look quite tired. You'd better ________ a good rest.A．stop to have B．stop having C．to stop to have D．to stop having 6．—Jenny, you _________ push your way onto the bus.—I’m really sorry about it.A．mustn’t B．needn’t C．may not7．—Hi, Lucy, may I sit here?—No, ________. The seats are for teachers and parents.A．you needn't B．you aren't C．you mustn't D．you don't 8．—______ you please tell me something about the life in Canada or America?—Sorry, I______. I don’t know either. I’m from Australia.A．Could; couldn’t B．Can; couldn’t C．Could; can’t D．Can; mustn’t 9．—Susan, someone is waiting for you on the phone. It_______ be your sister, but I’m not sure.—Oh, please tell her to call me_______ because I’m busy now.A．might; later B．must; later C．might; late D．must; late 10．Since you are very tired, you ______ finish the work today.A．needn’t B．may not C．mustn’t D．can’t 11．—Look! Mrs. Smith is standing in front of the teaching building.—It______ her. She has gone to Egypt for her holiday.A．must be B．mustn’t be C．can be D．can’t be 12．—Could I call you by the first name?—Yes, you .A．will B．could C．may D．might13．One ______ easily lose his way when he visits or comes to a new place.A．may B．must C．need D．should14．This book _____ Lucy’s. Look! Her name is on the book cover.A．must be B．may be C．can’t be D．mustn’t be 15．Everyone______ be polite to their parents.A．could B．may C．should D．can16．Will you please________them________the Birdwatching Society?A．inviting; join B．to invite; to join C．invite; to join D．to invite; join 17．一Hurry up, Mark! Let's cross the road as quickly as possible.一No，you . Don't you see the light is still red?A．couldn't B．wouldn't C．mustn't D．needn't 18．—Mum, I’ve signed for a big box by Future Express (快递). What’s in it?—I’m not sure. It ________be a present from your brother.A．need B．must C．may D．will19．—Could you help me download some Taylor Swift’s songs from Ku Gou?—Sorry, people download music from the Internet without paying, because it’s against the law. A．wouldn’t B．needn’tC．mustn’t D．couldn’t20．My head teacher has made a set of rules to show what we students ________ and ________ not do in class.A．must; must B．will; willC．need; need D．might; might21．—I often see Maria in the library, and she _________ like reading best.—That’s right.A．need B．may C．must D．can22．—Can you come to my party on Saturday afternoon?—Sorry, I can’t. I ________ meet my friends.A．can’t B．might have to C．needn’t【参考答案】***试卷处理标记，请不要删除一、选择题1．C解析：C【解析】【分析】【详解】句意：——这个读书报告很重要。
(易错题精选)初中英语语法知识—情态动词的易错题汇编含解析
一、选择题1．— Must I finish the homework now?— .You can do it later.A．No, you needn’t B．Yes, you must C．No, you can’t2．Since you are very tired, you ______ finish the work today.A．needn’t B．may not C．mustn’t D．can’t3．—Is Wendy in the classroom now?—I’m not sure. She ________ be there. I saw her in the library ten minutes ago.A．may not B．must not C．shall not D．would not 4．The designer has tried every possible way to make the robot light, so you _____ worry about its weight.A．must B．may C．can’t D．needn’t5．---Mum, must I finish my homework today?---No, you . Tomorrow is Sunday and you may have a rest today.A．shouldn’t B．mustn’t C．can’t D．don’t have to 6．—I can't stop smoking, doctor.—For your health, I'm afraid you ________.A．must B．can C．may D．need 7．—Jenny, you _________ push your way onto the bus.—I’m really sorry about it.A．mustn’t B．needn’t C．may not8．—Hi, Lucy, may I sit here?—No, ________. The seats are for teachers and parents.A．you needn't B．you aren't C．you mustn't D．you don't 9．（江苏省无锡市锡北片2017届九年级下学期期中考试）—Where are you going for your summer holiday?—We go to Yun Nan, but we haven’t decided yet.A．should B．will C．may D．must 10．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true.A．must not B．may not C．needn’t D．will not11．—I feel tired.—You ________ go to bed so late.A．must B．shouldn’t C．should12．I’m sorry, children over 1.4 meters________pay the full price for the show.A．may B．must C．can D．ought to 13．This book _____ Lucy’s. Look! Her name is on the book cover.A．must be B．may be C．can’t be D．mustn’t be14．— Will Jim come to Yangzhou for a holiday?— He ________come, it depends on how much homework he will have.A．may B．should C．must D．need 15．—Mum, I’ve signed for a big box by Future Express (快递). What’s in it?—I’m not sure. It ________be a present from your brother.A．need B．must C．may D．will16．—Is Wilson on duty in class today?—It________be him. It's his turn tomorrow.A．must B．can't C．should D．needn't 17．—Could you help me download some Taylor Swift’s songs from Ku Gou?—Sorry, people download music from the Internet without paying, because it’s against the law. A．wouldn’t B．needn’tC．mustn’t D．couldn’t18．一Already five people in the taxi, but the driver managed to take me as well.一Terrible, and it be an uncomfortable journey.A．can B．should C．must D．need19．— May I watch TV for a while?— No, you __________. You have to finish your homework first.A．can’t B．needn’t C．mustn’t D．won’t20．---You look very pretty, if I say so.---Thanks a lot for saying that.A．must B．may C．will D．have to 21．— Could you play the piano when you were 8 years old?— ________.A．Yes, I could B．No, I can’t C．Yes, I can D．No, I won’t 22．— May I have some wine?— No, you . You have to drive home later.A．shouldn't B．needn't C．mustn't D．may not【参考答案】***试卷处理标记，请不要删除一、选择题1．A解析：A【解析】【分析】【详解】句意：——我必须现在完成作业吗？——不，你不需要，你可以稍后做。
(易错题精选)初中英语语法知识—情态动词的图文解析
一、选择题1．—Must I go out to have dinner with you, Mum?—No, you , my dear. You’re free to make your own decision.A．shouldn’t B．mustn’t C．needn’t D．can’t 2．—Must I finish my homework this evening?—No,you ________.You have a three﹣day holiday.A．won't B．mustn't C．needn't3．—I’d like ________ Guo Jingming’s Tiny Times.—You had better________ his books. The stories he tells are far from real life. A．buying, don’t read B．to buy, not readC．buying, not read D．to buy, not to read4．Look at the sign! It s ays “No Smoking!” You ________ smoke here. It’s dangerous. A．mustn’t B．ought not to C．needn’t D．don’t have to 5．―I didn’t pass the driving test again.―Don't worry. Just like the weather, life be beautiful all the time.A．can't B．needn't C．shouldn't D．mustn't6．I hope you __________ to my birthday party.A．to come B．can come C．comes D．are come 7．—Hi, Lucy, may I sit here?—No, ________. The seats are for teachers and parents.A．you needn't B．you aren't C．you mustn't D．you don't 8．—Tom, we’re going sh opping at eight, right?—Yeah, but I ______ be a little late, so don’t wait for me.A．may B．should C．mustn’t 9．—Sorry, Ms Wang. I left my homework at home. Must I hand it in today?—No, you_______ . You_______ bring it here tomorrow.A．mustn’t; should B．ne edn’t; must C．mustn’t; may D．needn’t; can 10．— I wonder if these are Jim's glasses.—They _____his. He doesn't wear glasses.A．might be B．could be C．can't be 11．—Jenny, we buy Mom presents. We can clean the house from top to bottom.—Good idea! It’s a special present for Mother’s Day.A．can’t B．mustn’tC．shouldn’t D．needn’t12．I’m sorry, children over 1.4 meters________pay the full price for the show.A．may B．must C．can D．ought to 13．–Is Mike coming to the fashion show tomorrow?--I’m not sure. He ______ not come.A．must B．can C．may D．should 14．（2017 • 湖北省宜昌市中考）—Life is becoming convenient with the Internet.—That’s true! Almost everything be done online.A．must B．would C．should D．can 15．—Must I sleep now? —No, you________.A．needn't B．mustn't C．can't D．may not 16．—Is Wilson on duty in class today?—It________be him. It's his turn tomorrow.A．must B．can't C．should D．needn't 17．— May I watch TV for a while?— No, you __________. You have to finish your homework first.A．can’t B．needn’t C．must n’t D．won’t18．---You look very pretty, if I say so.---Thanks a lot for saying that.A．must B．may C．will D．have to19．—I often see Maria in the library, and she _________ like reading best.—That’s right.A．need B．may C．must D．can20．— Could you play the piano when you were 8 years old?— ________.A．Yes, I could B．No, I can’t C．Yes, I can D．No, I won’t 21．－Mum, must I stay there the whole day?－No, you__________. You__________ come back after lunch, if you like.A．mustn’t; can B．needn’t; must C．nee dn’t; may22．I see the blackboard. I need to have my glasses.A．can B．can’t C．must D．mustn’t【参考答案】***试卷处理标记，请不要删除一、选择题1．C解析：C【解析】【分析】【详解】句意：——妈妈，我必须和你出去吃饭吗？——不，你不必。
新初中英语语法知识—情态动词的图文答案(1)
一、选择题1．He like coffee. I see him drink a cup at times.A．must B．may C．can’t D．mustn’t 2．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true.A．must not B．may not C．needn’t D．will not 3．—Must I finish the work today, Mum?—No, you ________.You can finish it tomorrow.A．mustn't B．can't C．shouldn't D．needn't4．I hope you __________ to my birthday party.A．to come B．can come C．comes D．are come 5．You______ worry about your lessons. Be careful next time and you will get a good mark. A．don’t need to B．not need C．needn’t to D．don’t need 6．—Is that cap Bob’s?—No, it ________ be his. His is blue.A．can’t B．mustn’t C．needn’t D．may not 7．A: Is Jim coming by train?B: I’m not sure. He _______ drive his car.A．must B．may C．need D．should8．—I can't stop smoking, doctor.—For your health, I'm afraid you ________.A．must B．can C．may D．need 9．—Can I take some milk and biscuits to the reading room?—No, our school has a rule that students _______ eat or drink there.A．can’t B．mustn’t C．needn’t D．may not 10．— I wonder if these are Jim's glasses.—They _____his. He doesn't wear glasses.A．might be B．could be C．can't be11．—How nice the building is! What is it for? —It ________ a hotel. But I’m not sur e. A．must be B．have to be C．may be D．can be 12．—Could I call you by the first name?—Yes, you .A．will B．could C．may D．might13．It is 11:00 p.m now. Peter hasn't come back yet. His mother ______ be very mad at him. A．may B．can C．must D．need 14．—Jack must be in his office, I think.—No, he be in the office. He flew to Canada this morning.A．needn't B．shouldn't C．can't D．mustn't15．This book _____ Lucy’s. Look! Her name is on the book cover.A．must be B．may be C．can’t be D．mustn’t be16．-_________ you help me with my homework?-Of course if I __________.A．Could; could B．Can't; can C．Could; can D．Can; could 17．Will you please________them________the Birdwatching Society?A．inviting; join B．to invite; to join C．invite; to join D．to invite; join 18．一Hurry up, Mark! Let's cross the road as quickly as possible.一No，you . Don't you see the light is still red?A．couldn't B．wouldn't C．mustn't D．needn't 19．（2017 • 湖北省宜昌市中考）—Life is becoming convenient with the Internet.—That’s true! Almost ev erything be done online.A．must B．would C．should D．can20．—Is Wilson on duty in class today?—It________be him. It's his turn tomorrow.A．must B．can't C．should D．needn't21．My head teacher has made a set of rules to show what we students ________ and ________ not do in class.A．must; must B．will; willC．need; need D．might; might22．—Tom, we’re going shopping at eight, right?—Yeah, but I ______ be a little late, so don’t wait for me.A．may B．should C．mustn’t【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】【详解】句意：他可能喜欢咖啡。
(易错题精选)初中英语语法知识—情态动词的真题汇编附答案解析
一、选择题1．—Must I start now?—No, you_______________.A．mustn't B．can't C．needn't D．must2．—Must I finish the work today, Mum?—No, you ________.You can finish it tomorrow.A．mustn't B．can't C．shouldn't D．needn't 3．Since you are very tired, you ______ finish the work today.A．needn’t B．may not C．mustn’t D．can’t4．―I can't stop smoking, Doctor.―For your health, I'm afraid you .A．must B．can C．need D．have to5．―I didn’t pass the driving test again.―Don't worry. Just like the weather, life be beautiful all the time.A．can't B．needn't C．shouldn't D．mustn't 6．—Can we walk across the road now?—No, we . We have to wait until the light turns green.A．couldn’t B．needn’t C．shouldn’t D．mustn’t7．（江苏省无锡市锡北片2017届九年级下学期期中考试）—Where are you going for your summer holiday?—We go to Yun Nan, but we haven’t decided yet.A．should B．will C．may D．must 8．—Tom, we’re going shopping at eight, right?—Yeah, but I ______ be a little late, so don’t wait for me.A．may B．should C．mustn’t9．I see the blackboard. I need to have my glasses.A．can B．can’t C．must D．mustn’t 10．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true.A．must not B．may not C．needn’t D．will not 11．—Jack must be in his office, I think.—No, he be in the office. He flew to Canada this morning.A．needn't B．shouldn't C．can't D．mustn't 12．—Could I call you by the first name?—Yes, you .A．will B．could C．may D．might 13．—Must I go out to have dinner with you, Mum?—No, you , my dear. You’re free to make your own decision.A．shouldn’t B．mustn’t C．needn’t D．can’t 14．—I feel tired.—You ________ go to bed so late.A．must B．shouldn’t C．should15．— Must I finish the homework now?— .You can do it later.A．No, you needn’t B．Yes, you must C．No, you can’t 16．When I write down what I am showing thanks to, it’s always for things that money ______buy.A．needn’t B．shouldn’t C．may not D．can’t 17．— Must I go home? — No, you ________.A．can’t B．mus tn’t C．don’t D．needn’t 18．---I heard they went skating in the mountains last winter.---It ______ true because there was little snow there.A．may not be B．won’t be C．couldn’t be D．will be 19．—The food ________be delicious . You ate it up .—You bet . My mum cooked it for me .A．must B．may C．can D．need 20．— Will Jim come to Yangzhou for a holiday?— He ________come, it depends on how much homework he will have.A．may B．should C．must D．need 21．—Must I hand in my reports today?—No, you ________.A．mustn’t B．c an’t C．shouldn’t D．don’t have to 22．—________ I borrow the books from the library, Miss Yang?—Sorry, you________. These books are only for members of the English Club. A．Can; couldn’t B．Could; can’tC．Could; couldn’t D．Can; needn’t【参考答案】***试卷处理标记，请不要删除一、选择题1．C解析：C【解析】【分析】【详解】句意：——我必须现在开始吗？——不，你不必了。
(易错题精选)初中英语语法知识—情态动词的图文答案(1)
一、选择题1．—The book report is very important. You ________ write it carefully.—But I ________ hand it in now.A．must; must B．have to; mustC．must; have to D．have to; have to2．—Must I finish the work today, Mum?—No, you ________.You can finish it tomorrow.A．mustn't B．can't C．shouldn't D．needn't 3．-Listen! A wolf is crying!-It _______ be a wolf, because a wolf never comes out at this time.A．mustn’t B．needn’t C．can’t D．don’t 4．Look at the sign! It says “No Smoking!” You ________ smoke here. It’s dangerou s. A．mustn’t B．ought not to C．needn’t D．don’t have to 5．―I didn’t pass the driving test again.―Don't worry. Just like the weather, life be beautiful all the time.A．can't B．needn't C．shouldn't D．mustn't6．I hope you __________ to my birthday party.A．to come B．can come C．comes D．are come 7．—Is that Kate’s green bike?—It ____________be hers. She likes pink.A．can’t B．could C．mustn’t D．might 8．—Can we walk across the road now?—No, we . We have to wait until the light turns green.A．couldn’t B．needn’t C．shouldn’t D．mustn’t 9．—Jenny, you _________ push your way onto the bus.—I’m really sorry about it.A．mustn’t B．needn’t C．may not10．—I’d like ________ Guo Jingming’s Tiny Times.—You had better________ his books. The stories he tells are far from real life. A．buying, don’t read B．to buy, not readC．buying, not read D．to buy, not to read11．—Can I take some milk and biscuits to the reading room?—No, our school has a rule that students _______ eat or drink there.A．can’t B．mustn’t C．needn’t D．may not 12．I’m sorry, children over 1.4 meters________pay the full price for the show.A．may B．must C．can D．ought to 13．— May I have some wine?— No, you . You have to drive home later.A．shouldn't B．needn't C．mustn't D．may not 14．Since the road is muddy,it ________last night, ________?A．must be rained; wasn’t it B．must have rained; didn’t itC．must rained; didn’t it D．must have rained; wasn’t it15．— Must I finish the homework now?— .You can do it later.A．No, you needn’t B．Yes, you must C．No, you can’t16．This book _____ Lucy’s. Look! Her name is on the book cover.A．must be B．may be C．can’t be D．mustn’t be 17．The flowers ________ every day, or they will die.A．must water B．can be wateredC．should water D．must be watered18．---I heard they went skating in the mountains last winter.---It ______ true because there was little snow there.A．may not be B．won’t be C．couldn’t be D．will be 19．—Must I sleep now? —No, you________.A．needn't B．mustn't C．can't D．may not 20．—Who is the lady over there? Is it Miss Wang?—It __________be her. Miss Wang is much taller.A．needn't B．mustn't C．shouldn't D．can't 21．—Could I call you by the first name?—Yes, you .A．will B．could C．may D．might 22．—Hi, Lucy, may I sit here?—No, ________. The seats are for teachers and parents.A．you needn't B．you aren't C．you mustn't D．you don't【参考答案】***试卷处理标记，请不要删除一、选择题1．C解析：C【解析】【分析】【详解】句意：——这个读书报告很重要。
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一、选择题1．—The book report is very important. You ________ write it carefully.—But I ________ hand it in now.A．must; must B．have to; mustC．must; have to D．have to; have to2．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—D on’t worry! The news _______ be true.A．must not B．may not C．needn’t D．will not 3．You run with the train when it is coming. It’s dangerous.A．may not B．mustn’t C．needn’t 4．(2018·山东临沂) Could you please speak a little louder? I ______ hear you very well. A．can’t B．mustn’tC．shouldn’t D．needn’t5．I’ve bought a nice necklace for Jo’s birthday. She _____like it, but I’m not sure.A．can B．may be C．might D．must6．—Is Wendy in the classroom now?—I’m not sure. She ________ be there. I saw her in the li brary ten minutes ago.A．may not B．must not C．shall not D．would not 7．—Is that Kate’s green bike?—It ____________be hers. She likes pink.A．can’t B．could C．mustn’t D．might 8．—Is that cap Bob’s?—No, it ________ be his. His is blue.A．can’t B．mustn’t C．nee dn’t D．may not 9．— Mom, I got a big box from express(快递). What is it?—I’m not sure. It ________be a present from your grandmother.A．should B．might C．must D．will10．— I wonder if these are Jim's glasses.—They _____his. He doesn't wear glasses.A．might be B．could be C．can't be11．—Can you come to my party on Saturday afternoon?—Sorry, I can’t. I ________ meet my friends.A．can’t B．might have to C．needn’t12．I’m sorry, children over 1.4 meters________pay the full price for the show.A．may B．must C．can D．ought to 13．It is 11:00 p.m now. Peter hasn't come back yet. His mother ______ be very mad at him. A．may B．can C．must D．need 14．One ______ easily lose his way when he visits or comes to a new place.A．may B．must C．need D．should15．— May I have some wine?— No, you . You have to drive home later.A．shouldn't B．needn't C．mustn't D．may not 16．(2017·甘肃白银·10)—I wonder if these are Danny's glasses.—They________be Danny's. He doesn't wear glasses.A．can't B．must C．mustn't D．can17．This book _____ Lucy’s. Look! Her name is on the book cover.A．must be B．may be C．can’t be D．mustn’t be 18．-_________ you help me with my homework?-Of course if I __________.A．Could; could B．Can't; can C．Could; can D．Can; could 19．— Must I go home? — No, you ________.A．can’t B．mus tn’t C．don’t D．needn’t20．–Is Mike coming to the fashion show tomorrow?--I’m not sure. He ______ not come.A．must B．can C．may D．should 21．—Could I call you by the first name?—Yes, you .A．will B．could C．may D．might22．The milk tastes bad. You’d better_______.A．throw it away B．to throw it awayC．throw them away D．to throw them away【参考答案】***试卷处理标记，请不要删除一、选择题1．C解析：C【解析】【分析】【详解】句意：——这个读书报告很重要。
你必须仔细地写。
——但我现在必须交上它。
考查情态动词。
must必须，表示说话人主观上的看法；have to不得不，必须，强调客观需要。
第一句表示说话人认为对方必须认真写，是主观看法，第二句表示客观需要不得不现在上交，故选C。
2．B解析：B【解析】【详解】句意：——你听说过2020年地球的温度将上升到59摄氏度吗?——不要担心。
那个消息可能不是真的。
考查情态动词。
must not禁止；may not可能不是。
needn’t不必；will not将不会。
根据“Don’t worry”可知，这里是这个消息可能不是真的,表示一种推测。
根据题意，故选B。
3．B解析：B【解析】【详解】句意：火车来的时候你不能跟它一起跑，这很危险。
考查情态动词。
may not可能不；mustn’t不能，表禁止；needn’t不需要。
根据“It’s dangerous”及语境可知，此处是表达“你不能跟着火车跑”，在这儿应是不允许，强烈的禁止的意思，故用mustn’t。
故选B。
4．A解析：A【解析】【详解】句意：请你说大点声好吗？我不能很好地听到你说的话。
考查情态动词辨析。
can't不能，表示不能够；mustn't不许，表禁止；shouldn’t不应该，表劝诫；needn’t无需，表示没必要。
本句表示“不能够”，根据句意语境，可知BCD三项意思都与句意不合，故选A。
5．C解析：C【解析】【详解】句意：乔的生日我给她买了一条漂亮的项链。
她可能会喜欢，但是我不确定。
考查情态动词表示推测。
can表示能、可以；may表示可能，might是其过去式；must表示一定、必须。
根据题干中but I'm not sure．可知可能性较小的推测，则可用may或者might，B项中may后有系动词be，原句中有动词like，则只能用might。
故选C。
6．A解析：A【解析】【详解】句意：—温迪现在在教室吗？—我不确定。
她可能不在那里，十分钟前我在图书馆见过她。
考查情态动词表推测。
may not可能不；must not一定不要；shall not将不会；would not将要、会、就会，表示虚拟、假设、条件等。
根据回答句“I’m not sure”，可推测后句应该是说：她可能不在那里。
是对现在情况的推测，may not“可能不”。
故选A。
7．A解析：A【解析】【详解】句意：—那是凯特的绿自行车吗？—那不可能是她的。
她喜欢粉色。
考查情态动词用法。
can’t不可能，不能；could能，构成过去式；mustn’t一定不要，表示禁止；might大概，可能。
根据后一句凯特喜欢粉色可知，表示不可能，用can’t，故选A。
8．A解析：A【解析】【详解】句意：——那顶帽子是Bob的吗？——不，那不可能是他的。
他的是蓝色的。
考查情态动词表推测。
can’t 不可能，否定推测；mustn’t 禁止，不表推测；needn’t 不需要；may not 可能不是，表不确定的推测。
根据回答“No”和“His is blue.”可知这里说话者表达完全否定推测，故选A。
【点睛】在情态动词表推测时，很多同学会搞混can’t和mustn’t，认为他们都表示完全否定的推测，在做题时容易误选。
can’t 不可能，表示完全否定的推测，但是mustn’t 禁止，并不用于表推测。
9．B解析：B【解析】【详解】句意：——妈妈，我从快递公司收到了一个大箱子。
它是什么？——我不确定。
可能是你祖母送的礼物。
考查情态动词。
should应该；might可能；must必须； will将，会。
根据“I’m not sure”可知下文是没有把握的肯定推测。
根据题意，故选B。
10．C解析：C【解析】【详解】句意：——我想知道是否这是Jim的眼镜。
——它们不可能是他的，他不戴眼镜。
考查情态动词。
A. might be可能是；B. could be有可能；C. can't be不可能，表示否定的推测，语气很强。
根据句意可知，空处是表示否定的推测，并且语气很强烈，故选C。
11．B解析：B【解析】【分析】【详解】句意：——星期六下午你能来参加我的派对吗？——抱歉，我不能。