情态动词最基本用法
1. can/ could/ be able to
1) I can sing this song.
I am able to arrive at school on time in spite of the heavy rain.表能力
2) Can/ Could I borrow your car? 表请求、许可（回答用can不用could）
3) Peter can be really difficult at times, even though he is a nice person in general.
It can be windy in Jiaozuo, especially in spring.有时会
4) Y ou can’t be too careful.
I cannot thank you enough.无论…也不过分，越…越好
练习：
1)Black holes ___not be seen directly, so determining the number of them is a tough
task.
A. can
B. should
C. must
D. need
2)It is usually warm in my hometown in March, but it ___be rather cold sometimes.
A.must
B. can
C. should
D.would
2. may/ might
1)–May I come in?
--Y es, you may/please. / --No, you may not./ you’d better not.表请求，许可（回答用may不用might）
2)May you succeed!表祝愿
3)If there’s a chance, I may/might as well have a try.做…也无妨，最好
It may well（not）be true.很可能（不）
练习：
–Might I watch TV after supper?
--Y es, you ___.
A. may
B. must
C. might
D. can
3.must
1)Y ou must do it now! / Y ou needn’t do it./ Y ou don’t have to.
We must study English, needn’t we? 表义务
2)Y ou mustn’t do it.表禁止
3)–I want to go now.
--If you must, at least wait till the rain stops.“非要，一定要”
练习：
1)In crowded places like airports and railway stations, you ___ take care of your
luggage.
A. can
B. may
C. must
D.will
2)John, look at the time. ___ you play the piano at such a late hour?
A. Must
B. Can
C. May
D. Need
4.should/ ought to
1)Y ou should work harder./What should I do?“应该”（义务、做某事正确明智、
征求或提供建议）
2)It is surprising that Tom should fall in love with Jerry.
How/ Why should you be so late today?“竟然”
3)Should it rain tomorrow, I would not go out. “万一”
练习：
1)–I think I’ll give Bob a ring.
--Y ou ___. Y ou haven’t been in touch with him for ages.
A. will
B. may
C. have to
D. should
2)Y ou can’t imagine that a well-behaved gentleman ___ be so rude to a lady.
A. might
B. need
C. should
D. would
5. shall
1)I shall be 18 next year. 第一人称表将来
2)Shall we go now? 一三人称表建议
3)Y ou shall have the book when I finish it.二三人称表命令，警告，允诺，威胁
4)–Can I pay the bill by check?
--Sorry, sir. But it is the management rules of our hotel that payment shall be made in cash.用于规章制度中
练习：
1)–What is its name?
--Khulaifi. ___ I spell that for you?
A. Shall
B. Would
C. Can
D. Might
2)–Excuse me, but I want to use your computer to type a report.
-- Y ou___ have my computer if you don’t take care of it.
A. shan’t
B. might not
C. needn’t
D. shouldn’t
6. will/would
1)The weather will be fine.表将来，“会”
2)–What a heavy box!
--Don’t worry, I will help you.说话临时决定
3)– Will you marry me? Yes, I will.表请求或意愿
