2021-2022学年人教版九年级英语全册语法-情态动词专题讲解及练习（word版，含答案）

情态动词
定义：表示情感、态度和语气的词。本身有一定的意义，但必须和动词原形一起构成句子的谓语。
特点：①后接动词原形 ②无人称、单复数变化 ③句型转换在情态动词本身上完成
包括：can、could、may、might、must、need、will、would、should、shall、dare
情态动词基本语法：
can
、能、会（能力） can do sth ≈ be able to do sth (适用于各种时态）
、能、可以（许可） e.g. You can use my computer.
、建议、请求（疑问句中） e.g. Can you give me a hand
Could
、（can的过去式）过去能
e.g. she could play the piano at the age of 6.
、表示委婉的语气，此时 could 没有过去式的意思，用在疑问句中
E.g. Could you please take out the rubbish
E.g. Could you tell me where she is now
May
、表示请求、许可（否定回答要用mustn’t/can’t）
e.g. May I borrow you bike
-Yes, you may/can.
-No, you can’t/mustn’t.
、表示祝愿、希望 （may + 主语 谓语）
e.g. May you be happy!
Might
（1）may的过去式
Must
、必须、一定 must do sth （主观一定要做）≈ have to do sth （客观上一定要做）
I must go to school and learn some Knowledge.我必须会学校上课学一些知识。（自己要回）
I have to go to school because the holiday is over.假期结束了我不得不回学校上课了。
高频考点、易错点 Must I sweep the floor now
-Yes, you must.
-No, you needn’t/don’t have to.
Mustn’t 禁止、不许、千万不准 e.g. teenagers mustn’t be allowed to smoke at school.
Need “需要”
、做情态动词： need do
高频考点、易错点 I need sweep the floor now.
Need I sweep the floor now
-Yes, you must.
-No, you needn’t/don’t have to.
、做实义动词：need sth/ need to do sth
He needs to sweep the floor now.
Does he need to sweep the floor now
-Yes, he does.
-No, he doesn’t.
Need doing sth = need to be done 需要被做
E.g. Your car needs washing. = Your car needs to be washed. 你的车需要洗了。
There is no need to do sth 没必要做某事
Will
、意愿、意志、打算 e.g. your parents will try their best to help you. 你的父母愿意尽最大努力帮助你
将（将来时） e.g. will do sth （客观上将会...） ≈ be going to do sth （主观上将会...）
高频考点、易错点： there will be / there is(are) going to be 某个地方将会有
征求意见 e.g. Will you please fold the clothes
Would
、will 的过去时（构成过去将来时）
e.g. Tom said that he would come back to Chongqing nest Friday. Tom说他下周五会回重庆。
、委婉语气，与时态无关
e.g. would you please turn off the light before you leave the classroom. 可以麻烦你在离开教室前关灯吗？
Should
、should do sth = be supposed to do sth = be expected to do sth 应该做某事
（2）、“应该” ，可表示劝告、建议、义务、责任等。
如：We should protect ourselves.. 我们应该我们自己。
had better 的用法：had better do意为“最好”，没有人称的变化，后接+动词原形，其否定形式为：had better not do。
如：We had better go home now.
You had better not go home now.
Shall
征求对方意见，多用于一人称
g. Shall we go out for a walk 我们可以出去散个步吗？
Dare
做情态动词 dare do sth
E.g. I dare not /daren't walk through the forest at night.
--- Dare you walk through the forest at night
--- Yes, I dare.
--- No, I daren't.
做实义动词 dare sth/ dare to do sth
E.g. He will dare any danger.
Did anyone dare to admit it
I have never dared (to) go back to take a look.
情态动词表推测：
Must ----肯定句中表把握很大的推测-----------------一定
Can’t----否定句中把握很大的推测--------------------一定不
May/might -----肯定句中，不太确定的推测------可能 （may 的可能性大于might）
Can/could ------疑问句中表推测-------------------可能
E.g. —Can it be our teacher
—No, it can’t be our teacher. He is on a visit to the Great Wall.
The book must be Tom’s, because there is his name on the cover.
The dictionary may belong to Mike. I am not sure about it.
语法专练
一
1、—_____ you pass me a pen I’d like to write down the phone number. —Sure. Here it is.
A. Can B. Need C. Might D. Must
2、—May I go to the cinema, mum — Certainly, but you ____ be back by 11 o’clock.
A. can B. may C. must D. need
3、You ______ get there by bus.
A. don’t need B. needn’t to C. don’t need to D. need don’t to
4、You _______ worry about me. It’s nothing serious.
A. can’t B. mustn’t C. needn’t D. won’t
5、—Excuse me. Is this the right way to the Summer Palace
----Sorry, I’m not sure. But it___ be.
A. might B. mustn’t C. can’t D. must
6、The man in the office___ be Mr. Black, because he went home just now.
A. mustn’t B. may not C. can’t D. needn’t
7、—Can you go surfing with us this afternoon
—I’d like to, but I __ look after my sister at home , because my mother is ill.
A. need B. must C. have to D. should
8、—May I take this book out of the reading room —______. Please read it here.
A. Certainly B. No, you needn’t C. No, you mustn’t D. No, you may not
二
1. (2020·昆明)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 not
2. (2020·百色) -- Must I hand in the report now, sir
- . You can hand it in tomorrow.
A. Yes, you can B. Yes, you must C. No, you needn't D. No, you mustn't
3. (2020·包头)He _________ sleep, although he tried to. One cup of coffee in the late after - noon caused him to stay awake almost all night.
A. wouldn't B. shouldn't C. couldn't D. mustn't
4. (2020·青岛) -- Allen, shall we go to the bookstore this afternoon
- I'm sorry. David, but - I _________ meet my cousin at the train station.
A. have to B. can C. may D. could
5. (2020·营口) - Where are my keys I'm afraid I lost them again.
- Don't worry! With the new lock, you _________search for them any more.
A. shouldn't B. can't C. mustn't D. needn't
6. (2020·扬州)From the top of the Autumn Hill people _________ enjoy the fullest sight of
Ge Garden.
A. have to B. need C. should D. can
7. (2020·武汉) -- I don't care what people think.
- Well, you _________ . Some opinions are worth weighing.
A. might B. should C. could D. would
8. (2020·鄂州) - Whose textbook is it Is it Jenny's
- No, it _________ be Jenny's. Look, Helen's name is on the cover. I think it _________ be Helen's.
A. can't; must B. mustn't; must C. can't;may D. mustn't;may
9. (2020·十堰) - _________ you please take the dog for work
- OK, but I have to fold the clothes first.
A. Must B. Should C. Could D. May
10. (2020·镇江)I am proud that our Chinese survey team _________ successfully remeasure Qomolangma(再测珠穆朗玛峰), the world's highest peak.
A. must B. can C. may D. should
11. (2020·上海)According to the traffic law, children under 12 ______ ride bicycles on the road.
A. won't B. wouldn't C. needn't D. mustn't
12. (2020·咸宁) - Mum, it's too hot. _________ I swim in the lake with my friends
- No, you _________ . That's too dangerous!
A. Could; mustn't B. Need; couldn't C. Must; needn't D. Should;can't
13. (2020·泰州) -- In China, many students feel stressed because of too much home - work.
- Don't worry. Our government has realized this problem. I'm sure there _________ be good news for them soon.
A. can B. must C. should D. need
14. (2020·)There is a knock at the door. It ____ my mom. It's time for her to be back home.
A. maybe B. may not be C. must be D. mustn't be
15. (2020·泸州)Mr. Collins _________ like tea.He makes a cup of tea for himself every morning.
A. must B. may C. can't D. mustn't
16. (2020·苏州) -- Mum, why do I have to wash hands so many times a day
- For your health, you _________ be too careful.
A. can't B. shouldn't C. mustn't D. needn't
17. (2020·日照)Children _____ be told not to swim alone in the river.
A. can B. may C. must D. might
18. (2020·天津)I _________ be late, so don't wait for me to start the meeting.
A. mustn't B. needn't C. need D. may
19. (2020·南京)By the time she was eight, Linda _________ read English and French.
A. could B. must C. need D. may
20. (2020·连云港)If we don't protect nature, some wildlife _________ . die out in the future.
A. need B. may C. can't D. shouldn't
21. (2020·徐州)Mother had a hard time get - ting Helen up in the morning. She called and called, but Helen _________ wake up.
A. wouldn't B. mustn't C. needn't D. shouldn't
22. (2020·新疆)My classmate is jumping sc far! I _________ believe my eyes.
A. shouldn't B. needn't C. mustn't D. can't
23. (2020·玉林) -- Mom, _________ I watch my favorite TV show Everlasting Classic (《经典咏传》) now
- I'm afraid you can't. You must do the dishes first.
A. need B. must C. will D. may
答案：
一：1-8：ACCCACCC
二：1-10：ACCADDBACB
11-20: DABCAACDAB
21-23: ADD