分析全国近5年真题，不难看出，情态动词，作为常青树，她的基本用法备受命题人青睐。我们以人民的名义告知各位正在备考的小主，情态动词基本用法搞定了，拿分就不是问题。
我呢，近5年考查4次，只钟情于其基本用法，在完形填空中会考词义辨析，短文填空中考原形变过去式。
每年，在单项填空必会出现1道哟！基本用法和表推测我都爱，考词我是不会重复滴！
除2013年考查2道外，每年必考1道基本用法啦！单项选择和完形填空中涉及。
高频！高频！高频！近5年，我每年在单项选择中都考查1道（除2014年外）。表推测的话，may是我的爱。
我爱考基本用法，其中can’t考了2次啦。表推测我也不会不管的，还是要考滴！
情态动词，在单项填空中我必考，我爱考否定式，您瞧，don’t have to就考了2次。
基本用法我重复考，比如can’t和must；选项设置有特点，选项全肯或全否，2肯2否也出现。
单项选择选项中，其中3个要么均为肯定式，要么均为否定式；表推测我喜欢can’t和must。
基本用法我常考，还爱重复考，may，can，must与can’t要重点记哟。表推测的用法考查少。题型除了单项选择外，完形填空和选词填空偶尔会涉及哟！
地市多，不是偶的错。情态动词我看重，单项选择中常出现，完形填空、短文填空和综合填空我也不会落下的。
1. A good friend is someone you ______ share your pleasure and pain with.
A. ought
B. need
C. can
D. must
2. Please don't make so much noise. I ______hear the speaker very well.
A. needn't
B. mustn't
C. can't
D. shouldn't
3. —Mum, ______ I play football this afternoon?
—Sure, but you ______ finish your homework first.
A. may; could
B. can; must
C. can; mustn't
D. may; can't
4. You______ take me to the station. My brother's taking me.
A. can't
B. mustn't
C. shouldn't
D. don't have to
5. We need clean air and water, so we ______ protect the environment.
A. can
B. may
C. must
D. might
6. —What should we do to protect the fish in the river?
—We______ throw rubbish into the river.
A. need
B. needn't
C. must
D. mustn't
7. —We've got everything ready for the picnic.
—Do you mean I ______bring anything with me?
A.can't
B. mustn't
C. couldn't
D. needn't
8. —Excuse me, ______ I take the magazine out of the reading room?
—Sorry, you can’t. Just here, please.
A. must
B. would
C. may
D. need
9. —______ I borrow your dictionary?
—Sorry. I’ve left it at home.
A. Should
B. Need
C. Must
D. Could
10. —Finally, they came back.
—They______ be hungry after such a long walk.
A. can't
B. must
C. needn't
D.could
11. —Where are you going this month?
—We ______go to Xiamen, but we're not sure.
A. needn't
B. might
C. must
D. mustn't
12. The girl in the classroom ______ be Sarah. She has gone to the library.
A. may
B. must
C. can't
D. needn't
13. —Is Tom coming by train?
—He ______ drive his car, I'm not sure.
A. can't
B. may
C. must
D.shouldn’t
14. —Excuse me, is this the right way to the Children' s Palace?
—Sorry, I'm not sure. But it ______ be.
A. mustn't
B. might
C. can't
D. must
15. —Look, the lady in red______be our English teacher.
— No, she ______ be. She is in the office now.
A.must; can't
B. can; mustn't
C. may; mustn't
D. shall; can't
★ can与can’t
can | ①表示能力，“能,会” ②表示允许，“可以” | Sam can speak English well. Can I borrow your bike? |
can’t | ①“不会,不能” ②“一定不，不可能” | I can't give you an answer now. The man can't be my uncle.He has gone to Beijing。 |
★ could与couldn’t
could | ①“能，会”表示过去的能力。 ②在疑问句中表示委婉的请求。 ③“有可能，也许” | Jim could play the piano well when he was young. Could I have a cup of tea? I'm not sure when the flight to America will take off. I think it could be leaving in an hour. |
couldn’t | “不能，不会” | He couldn't dive last year, but now he can do it. |
★ must与mustn’t
must | ①表示主观看法，“必须，一定” ②肯定推测 | You must finish your homework first! They must be very tired after a long walk. |
mustn’t | 禁止，一定不要 | You mustn't play football on the road. |
★ may与might
may | ①表示请求、许可，“可以” ②“有可能，也许”（把握性不大） | You may sit here if you want. Your sister may be waiting for you now. |
might | ①may的过去式。 ②表示请求、许可，语气比may更委婉。 ③表推测，“有可能，也许”，可能性低于may。 | He asked if he might go home. Might I smoke here? No one knows what might happen in the future. |
★ need与needn’t
need | “需要” | You need say sorry to him. |
needn’t | “不需要” | You needn’t go with me. |
★ should/ought to与shouldn’t
should | “应该” | You should keep the room clean.
|
ought to | “应该” | You ought to sleep early. |
shouldn’t | “不应该” | You shouldn’t speak loudly here. |
★ will与would
will | 表示询问、请求，用于疑问句中。 | Will you pass me a book? |
would | 表示自愿、主动做。 | Jane said she would not talk with angry Tom. |
★ shall与had better
shall | ①表示询问、请求，用于第一、三人称。 ②表示决心、警告、命令，多用于第二人称。 | Shall we go out for a walk? You shall not bring your mobile phones to the classroom in the exam. |
had better | “最好要” | You had better have breakfast, or you will not focus on your work. |
★ have to与don’t have to
have to | “不得不”，多表示客观必要。 | I have to go to work every day. |
don’t have to | “没必要” | You don't have to come here so early. |
1.肯定推测：
must—100%可能性
may/can—50%~60%可能性
might/could—20%~50%可能性
2.否定推测：
can’t—可能性为零，语气强烈
may not—可能不，语气不确定
如：
Look! The woman must be Miss Black. She is always standing there this time every day.
The French book could be Alice’s. She studies French.
The French book could be Alice’s. She studies French.
Miss Gao can't be in the classroom. I just saw her in the supermarket.
It may not be my pen.I don't know where I put.
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