情态动词教案_情态动词的教案
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情态动词
1.概念: 情态动词: 表示说话者的某些观点或态度的词语.如 “能” , “或许” , “必须” , “需要” , “应该” 等.2.情态动词主要有: can, may, must, need, should, … 这些情态动词后面 + 动词原形.3.用法
① can ⑴ 表示能力,意为”能, 会”.如:
eg: I can play basketball.我会打篮球.---Can you play basketball ? 你会打篮球吗?---Yes, I can./ No, I can’t.是的, 我会./ 不, 我不会.⑵ 表示怀疑、猜测，常用 be 连用, 放在否定句和疑问句中。如：
eg: He can’t be in the room.他一定不在房间里.⑶ 表示请求或允许, 多用于口语中, 意为”可以”, 相当于 may.如:
eg: You can go now.你现在可以走了.② could ⑴ 是can 的过去式, 表示过去的能力.如:
eg: I could swim when I was a child.当我还是一个小孩子的时候我就会游泳了.⑵ couldn’t: “不能” 用could 提问肯定和否定回答分别用 could, 和 couldn’t.如:
eg:---Could you skate last year? 你去年会滑冰吗?
---Yes, I could./ No, I couldn’t.是的, 我会./ 不, 我不会.③ may ⑴ 表示推测, 意为“可能;或许” 用于肯定句中.eg: He may be a teacher.他或许是一个老师.⑵ 表示请求、许可，意为”可以” 如: eg:---May I borrow your book? 我可以借你的书吗?
---Yes, you can./ No, you mustn’t.是的, 可以./ 不, 你你禁止借书.注意: 当由may 来提问的时候, 肯定回答我们用Yes, you can.否定回答用 No, you mustn’t.④ must ⑴ 表示“必须、应该“；
eg: You must do your homework.你必须做作业.⑵ 表示推测, “一定” 常与be 动词连用.eg: He must be in the claroom.他一定在教室.⑶ must + not = mustn’t 禁止
eg: You mustn’t smoke.禁止吸烟.⑷ must 放于句首提问, 肯定回答Yes, you must.否定回答 No, you needn’t.⑸ must 与 have to 的区别：
must强调主观的看法．
have to 强调的是客观因素． eg: I must do my homework.我必须做作业．（个人看法）
I have to go home now, because my mother is ill.我不得不回家，因为我妈妈病了．（客观原因所导致）
⑤ need ⑴ 作情态动词使用后跟动词原形.You needn’t come here so early.⑵ 作实义动词使用后接to do, He needs to drink some water.他需要喝些水.变否定句: He doesn’t need to drink any water.变疑问句: Does he need to drink any water? Yes, he does./ No, he doesn’t.⑥ should “应该” 一般指应尽的某种义务．
eg: As a student, we should finish our homework.作为一个学生，我们应该完成作业．
练习：
（）1.Mr Wang ______ be in Nanjing now, he went to Beijing only this morning.A.mustn’t
B.may not
C.can’t
D.needn’t（）2.–Must I saty at home, Mum?
--No, you ______.A.needn’t
B.mustn’t
C.don’t
D.may not（）3.–Can you go swimming with us this afternoon?
--Sorry, I can’t.I _____ take care of my little sister at home because my mother is ill.A.can
B.may
C.would
D.have to（）4.–May I go to the cinema, Mum?--Certainly.But you ______ be back by 11 o’clock.A.can
B.may
C.must
D.need（）5.To make our city more beautiful, rubbish ______ into the river.A.needn’t be thrown
B.mustn’t be thrown
C.can’t throw
D.may not throw（）6.–May I go out to play basketball, Dad?--No, you ______.You must finish your homework first.A.mustn’t
B.may not
C.couldn’t
D.needn’t（）7.–Where is Jack, please ?
--He _____ be in the reading room.A.can
B.need
C.would
D.must（）8.–Who is the man over there? Is it Mr Li?
--No, it ______ be him.Mr Li is much taller.A.musn’t
B.may not
C.can’t
D.needn’t
（）9.These books ______ out of the reading room.You have to read them here.A.can’t take
B.must be taken
C.can take
D.mustn’t be taken（）10.–Mum, may I watch TV now?
--Sure, but you ______ help me with my housework first.A.can
B.may
C.must
D.could（）11.The boy said he had to speak English in cla, but he ______ speak it after cal.A.could
B.didn’t have to
C.might
D.shouldn’t（）12.–Must we hand in the papers now?
--No, you ______.A.can’t
B.may not
C.mustn’t
D.needn’t（）13.John ______ go there with us tonight, but he isn’t very sure about it.A.must
B.can
C.will
D.may（）14.Even the top students in our cla can’t work out this problem.So it ______ be very difficult.A.can
B.may
C.must
D.need（）15.Put on more clothes.You ______ be feeling cold with only a shirt on.A.can
B.could
C.would
D.must（）16.It’s still early.You ______.A.mustn’t hurry
B.wouldn’t hurry
C.may not hurry
D.don’t have to hurry（）17.–May I stop here?
--No, you ______.A.mustn’t
B.might not
C.needn’t
D.won’t（）18.A computer ______ think for itself, it must be told what to do.A.can’t
B.couldn’t
C.may not
D.might not（）19.–Could I borrow your dictionary?
--Yes, of course you _______.A.might
B.will
C.can
D.should（）20.Peter ______ come with us tonight, but he isn’t very sure yet.A.must
B.may
C.can
D.will（）21.Michael ______ be a policeman, for he’s much too short.A.needn’t
B.can’t
C.should
D.may（）22.______ I know your name?
A.May
B.Will
C.Shall
D.Must（）23.You ______ be more careful next time.A.have to
B.may
C.must
D.might（）24.You ______ mi the leon, though we ______ have it on Thursday.A.mustn’t;needn’t
B.needn’t;mustn’t
C.mustn’t;mustn’t
D.needn’t;needn’t（）25.This pen looks like mine, yet it isn’t.whose ______ it be?
A.must
B.may
C.would
D.can（）26.What kinds of homes will we live in the future? Nobody ______ be sure, but scientists are working out new ideas now.A.will
B.may
C.can
D.must（）27.I ______ like to know where you were born.A.shall
B.should
C.do
D.may（）28.______ you be happy!
A.Might
B.Must
C.Wish
D.May（）29.A teacher ______ do every exercise, but a student must.A.may not
B.needn’t
C.can’t
D.mustn’t（）30.The matter ______ be changed into a gas, but it _______ be heated to its boiling point.A.may;needn’t
B.may;can
C.mustn’t;needn’t
D.can;must（）31.Teachers and students ______ look coldly at you for a day or two, but there are friendly feelings in their hearts.A.must
B.can
C.may
D.should（）32.Cars and buses ______ stop when the traffic lights turn red.A.can
B.need
C.may
D.must（）33.–Do you think his story ______ true?--I don’ think so.But it sounds good.A.must be
B.may be
C.can be
D.has to be（）34.Look out!The knife is very sharp.You ______ cut your finger.A.need
B.must
C.should
D.may（）35.–How long ______ the book be kept?
--For two weeks, but you ______ return it on time.A.can;may
B.may;need
C.can;must
D.must;need（）36.– May I have an apple, Mum?
--Certainly.But you ______ wash your hands first?
A.may
B.must
C.can
D.need（）37.–There is a lot of smoke coming out of the teaching building there.--Really? It ______ be a fire, most probably.A.can
B.ought to
C.may
D.must（）38.–Shall I tell John about the bad news?
--No, you ______.I think that will make him sad.A.needn’t
B.wouldn’t
C.shouldn’t
D.mustn’t（）39.–Could I call you by your first name?
--Yes, you ______.A.will
B.could
C.may
D.might（）40.–Let’s go to the cinema, shall we?
--_______.A.No, I can’t
B.Yes, I will
C.Yes, thank you
D.No, we’d better not（）41.--______ the man over there be our new teacher?
--He ______ be, but I’m not sure.A.May;mustn’t
B.Can;may
C.Must;can’t
D.Can;can’t（）42.–Someone is knocking at the door.Who ______ it be?
--It ______ be Tom.He is still in the school.A.can;can’t
B.can;mustn’t
C.might;could
D.might;may（）43.Lily finished _______ the book yesterday.A.read
B.reading
C.to read
D.reads（）44.Susan’s parents have bought a large house with a swimming pool.It _______ be very expensive.A.must
B.can
C.mustn’t
D.can’t（）45.–The room is so dirty._______ we clean it?
--Of course.A.Will
B.Would
C.Do
D.Shall
