课件23张PPT。情态动词语法特点1）?情态动词不能单独做谓语，后面加动词原形。
2）?情态动词没有人称、数的变化。
3）?情态动词的“时态”形式并不是时间区别的主要标志.
Would you mind if I ask you to do something?
Could I use your bike?课内探究may might1)—May/Might I use your pencil?
--Yes, you may./ No, you mustn’t.
表示：
2) She may not be working now.
John might be at home now.
She may/might have gone to the cinema.
表示：
3) May you succeed!
表示：
请求或允许没有把握的推测祝愿练一练1.I’m afraid it_____ rain tonight; then we will have to stay at home. A. can B. could C. should D. might
2.He looked at us hopefully and said: “___ all of you succeed this time. I will be waiting for good news from you.”
A. Can B. Must C. May D. Will
DC体验高考1.--____ I take the book out?
-- I’m afraid not.(10四川)
A. Will B. May C. Must D. Need
2.--- Are you coming to Jeff’s party?
---- I’m not sure. I ____ go to the concert instead.(2000)
A. must B. would C. should D. might
3.---- Is John coming by train?
----- He should, but he ____ not. He likes driving his car. (2002)
A. must B. can C. need D. may
BDDcan could be able to1. I can’t swim, but I am sure I will be able to swim across it this time.
I?could?read?when?I?was?four.
The fire spread through the hotel, but everyone was able to get out.
can表示:
be able to表示：
一贯的的能力干具体的某事成功了2.--Could/Can I have a look at your
notebook?
--Yes , you can. /No,?you?can't.
表示:
3. He can’t be in now, for the light is off.
He can’t have gone to school, because
today is Sunday.
表示:
4.It is usually cool in my hometown. But
it can be rather hot sometimes.
表示:请求或允许推测，常用于否定、疑问句有时候会练一练1-- Could I borrow your dictionary?
--Yes. Of course you ___.
A. might B. will C. can D. should
2.Jake___ yet, otherwise he would have
telephoned me.
A. mustn’t have arrived
B. shouldn’t have arrived
C. can’t have arrived
D. needn’t have arrivedCC3. He studied very hard last term, so he
______ get the first prize in the final
examination.
? A. could??? B. was able to??
C. might???? D. wouldB体验高考I’m afraid Mr. Harding _____ see you
now. he’s busy.(10全国)
A. can’t B. mustn’t
C. shouldn’t D. needn’t
2.You ____ be tired, you’ve only been
working for an hour. (2008全国)
A. must not B. won’t
C. can’t D. may not
3. The temperature in our city ____ fall to 13℃ below freezing in winter.
A. need B. can C. must D. should
ACBwill would①If you will help me with my English, I will be very happy.
②Would/Will you please speak again more slowly？
③I will never do that again.
④During the vacation, he would visit me every other day. 愿意请求会（习惯行为）过去总是练一练1.When he was there, he _____ go to
that coffee shop at the corner after
work every day.
A. might B. should C. could D. would
2.John promised his doctor he ______
not smoke, and he has never smoked
ever since.(08北京)
A.might B. should C. could D. would
DDshall1.shall用于第_______人称表示允诺、警告、命令、决心等。
You shall do as I say.
Tell him that he shall have the book tomorrow.
Nothing shall stop me doing it.
2.在疑问句中,用于第_______人称，用来表示请求或征求意见。
Shall I open the window for you？
Shall he fetch some water for you？
二、三 一、三命令允诺决心should1 Young people should/ought to learn how to use computers.
2 Dinner should/ought to be ready by
now.
Our teacher should/ought to be at work
now.
3 If the car should break down on the
way, you would have to walk back.
4 I am sorry that she should be so careless.
应该（劝告）理应（按常理推测）万一竟然5 You should/ought to have told her the
truth earlier.
She shouldn’t have left without saying
a word.
本应该…本不应该…练一练1. I often see lights in that empty house. Do you think I ___ report it to the police?
A. should B. may C. will D. can
2. I__have watched that movie---it’ll give me horrible dreams.(10山东)
A shouldn’t B. needn’t
C. couldn’t D. mustn’tAA3. The printer is of good quality. If it ____
break down within the first yeas, we
would repair it at our expense.(09安徽)
A would B. should C. could D. might
4.--I haven’t got a reference book yet,
but I’ll have a test on the subject
next month.
-- Don’t worry. You ___have it by Friday.
A could B. shall C. must D. may
BBmust1 — Must?I?finish?all?homework at a time?
—Yes, you must . No,?you?needn't.
You?mustn’t?get?down?while?the car is
? ?still? moving.
2 He?must?be?joking.
There?is?nobody?here.?They?must?have
gone?home.
必须不准（禁止）肯定在肯定已经3 ---I am going to fish today.
---Go on then, if you must.
Must you play the piano so late?
偏要；硬要
if you must.如果你非得做得话，
Must you…?你非得…吗？
练一练1. I have told you the truth. __I keep repeating it?
A. Must B. Can C. May D. Will
2. You _____ park here! It’s an emergency exit.(10重庆)
A wouldn’t B. needn’t
C. couldn’t D. mustn’t
3. He ____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.(05北京)
A should B. must C. wouldn’t D. can’t
ADB推测常用用法归纳重点强化1现在他肯定在打扫卫生。
他肯定打扫过卫生了。
2 现在他也许在打扫卫生。
他也许打扫过卫生了。
He must be cleaning the room now.He must have cleaned the room.He may/might be cleaning the room now.He may/might have cleaned the room.3现在他不可能在打扫卫生。
他不可能打扫过卫生了。
He can’t be cleaning the room now. He can’t have cleaned the room.特殊用法归纳1我有时候会很凶。
I_____be rude sometimes.
2他过去总会来看我。
He_______often visit me in the past.
3你要按照我所说的去做。
You______do as I say.
4你让我为你打开窗户吗？
______I open the door for you?
canwouldshallShall5按理来说，到现在晚饭应该准备好了。
Dinner________be ready by now.
6.他竟然对我这么无礼。
He_______be so rude to me.
7你偏要睡得这么晚吗？
______you sleep so late?
shouldshouldMust
