Unit 2 Healthy eating-Grammar

(共45张PPT)
Period 4
Grammar
Modal Verbs
The first wealth is health .
健康是人生第一财富。
A light heart lives long.
豁达者长寿。
Early to bed and early to rise makes a man healthy , wealthy and wise.
早睡早起会使人健康、富有和聪明。
Without health no pleasure can be tasted by man.
没有健康就没有乐趣。
Good health is over wealth.
健康是最大的财富。
What should/shouldn’t we do to keep healthy
If you’d like to give advice or opinions, you can use
should/ ought to/ had better do
What ought we to do to keep healthy
Good habits can help us to keep healthy and bad ones can cause diseases. There is a serious disease called H1N1 flu these days. It spreads easily among people in spring and autumn. The flu is a serious disease, but we don’t have to be afraid of it. We can do something to prevent it. But how
We ought to keep the air fresh all the time.
We ought to keep away from crowded places.
We’d better drink more water every day.
You should go to school right away.
It’s eight o’clock now. He should be at work.
It seems so unfair this should happen to me.
You should have reminded me of the meeting.
What should we do now
表惊讶：竟然
用于第一人称疑问句，询问对方的意愿
表责备，谴责
What kind of food must we eat to be strong
must / have to
Must I finish the task right now
Yes, you must/ you have to.
No, you needn’t / you don’t have to.
She called me yesterday evening
but I didn’t hear it.
I _________________ (be) asleep.
must have been
1. --Will you stay for lunch
--Sorry, _____. My brother is coming to see me.
A. I mustn’t B. I can’t
C. I needn’t D. I won’t
2. --May I pick a flower in the garden -- ________.
A. No, you needn’t B. Not, please.
C. No, you mustn’t D. No, you won’t.
3. You ______ return the book now. You can keep it till next week if you like.
A. can’t B. mustn’t C. needn’t D. may not
4. John, you __ play with the knife, you __ hurt yourself.
A. won’t ; can’t B. mustn’t ; may
C. shouldn’t ; must D. can’t ; shouldn’t
C
B
B
C
mustn’t
needn’t
shouldn’t
can’t
表示否定的情态动词的用法:
不准, 禁止
没必要 ( = don’t have to )
不应该 ( = ought not to )
不能，不可能
Could you use them to make sentences
What modal verbs have you learned
can/could
may/ might
will/ would
shall/ should had better
must have to need
ought to
dare
*can / could 只能表示现在或过去的能力
* be able to 能用于各种时态
相当于manage to do sth. / succeed in doing sth.
1. 表示“能力”的情态动词的用法
can, could （be able to）
He ___________ go to the party yesterday evening in spite of the heavy rain.
2. Although he _____swim, he __________ cross the river.
was able to
can’t
was able to
may / might, can / could
2. 表示“许可”的情态动词
1. ---____ I go out to play, mum
---No, you___. You should do your homework first.
A. Might; wouldn’t B. Can; needn’t
C. Can; can’t D. Need; mustn’t
2. --- Could I call you by your first name
--- Yes, you____.
A. will B. could C. can D. might
3. 表示“请求”的情态动词的用法
will / would, shall/should
* 均可表示将来。 过去时为 should, would.
* will, would 可表示意愿、常出现的动作。
在疑问句中表示请求和建议.
must, could , may, might, can’t
4.表示“推测，可能性”的情态动词
can 表示推测时，只能用在否定句或疑问句中。
It’s so late. Can Tom be reading
这么晚了，汤姆还在看书吗？
这个人不可能是玛丽， 她生病了。
It couldn’t be Mary. She had fallen ill.
情态动词能表示时态吗？
1. 表示对现在的推测
2. 表示对过去的推测
3.表示对将来的推测
表示推测——情态动词的重要用法
肯定的推测
可能的推测
否定的推测
疑问的推测
must
对将来 对现在 对过去
情态动词
may, might
can’t,
couldn’t
can, could
+ V. + V. + have done
常见must be + be doing
+ V. + V. + have done
+ be doing
可以用not表示“可能不”
+V. + V. + have done
+ be doing
+ V. + V. + have done
+ be doing
You look tired. You _______ go to bed now.
should
You _______________ believe everything you read on the Internet.
shouldn’t/can’t
My mother cooked a lot
of food for me. She has
been cooking all the morning.
She must be tired now.
I have just eaten a lot of food for lunch.
You can’t be hungry now.
My house is near the railway.
It ____ be noisy there.
must
The old restaurant
______ be very good.
It’s always full of
people.
The new restaurant
______ be very good.
It’s always empty.
must
can’t
Where is Jane
Perhaps she is reading newspapers.
=She ________________ (read) newspaper.
may be reading
In China, many children ________ wear uniform when they go to school.
have to
Don’t tell anybody what I said. You ______ keep it a secret.
must
The floor is clean. You ________ sweep it.
needn’t
The floor is clean. You ___________ swept it.
must have
I promised I would be on time.
I _________ be late.
couldn’t
Last night Paul became ill suddenly.
We ________ call the doctor.
had to
We can’t repair the car ourselves.
We __________ take it to a garage.
have to
I can manage the shopping alone. You _________ come with me.
needn’t
That is an important book.
You ______ keep it well.
must
Excuse me, ______ you tell me the way to the railway station, please
could
You are carrying a lot of things. You can’t open the door yourself. There’s a man standing near the door. You say to him:
______ you open the door, please
Could
______ you like a cup of coffee
Would
1. By lunchtime they would all be sold.
2. His restaurant ought to be full of people.
3. What could have happened
4. Nothing could have been better.
5. Something terrible must have happened.
6. I will take all that fat off you in two weeks.
7. He could not believe his eyes.
8. He wondered if he should go to the library to find out.
9. He couldn’t have Yong Hui getting away with telling people lies.
10. He had better do some research.
11. After eating in the restaurant people would become fired very quickly.
Intention B. Duty C. Promise
D. Possibility E. Guessing
(D)
(D)
(E)
(A)
(B)
(A)
(B)
(D)
(C)
(D)
(D)
1. I thought you　　like something to read,
so I have brought you some books. A may B. might　C. can　D. must
2.You　　to the meeting this afternoon if
you have something important to do. A. needn‘t to come　 B. don’t need come
C. don't need coming D. needn't come 3.He　　you more help, even though he was
very busy. A. might have given
B. might give C. can have given D.may give 4.---　　I help you with some shoes,madam ---Yes, I would like to try on those brown ones. A. Will　B. Should C. May　D. Must
5.The reason why they 　　 leave wasn’t
explained to us.
A.had　B. had to C. must D. might
6.I searched for my wallet and it wasn’t
there. I thought I　　it at home.
A.left B. have left
C.might have left D. can have left
7.I ___ asleep because it took me a long
time to realize that the telephone was
ringing.
could have fallen 　 B. should have fallen
C. must have fallen D. mustn't have fallen
8.The only thing that really matters to the children is how soon they __ return to their school. A. can　B. must C. have to D. ought to
9.I want to go to Mary's, but you __ go with me. A. need not B. must not C. need D. must
10.What we ___　get seems better than what we have. A. can B. could　C. can't　D. couldn't
11.-My goodness! I've just missed the train.
-That's too bad. I am sure you___ it, if you had hurried.
A. could have caught B. had caught
C. would catch 　　　 D. could catch
12.Look! What you've done! You 　　more careful.
　　A.　may be B. had to　C. should have been 　D. would be
13.__I repeat the question 　
　　 A.　Shall 　B.　Will 　　C.　Do you want that 　　D. Do
1４.─There were already 5 people in the car,　but they managed to take me as well.
　─It 　a comfortable journey.　 　A. 　can’t be　　 　B.　shouldn’t be 　C.　couldn’t have been D.　mustn't have been
1５.Tom ought not to 　_me your secret, but he meant no harm. 　A.　have told 　B.　tell 　 C.　be telling D.　having told
１６.I parked my car right here but now it‘s gone.It 　. 　　A.　must be stolen　 B.　may be stolen 　　C.　must have stolen D.　must have been stolen
１７.He 　the work yesterday,but he didn‘t.　　 　　A.　must have finished B.　need finish 　　
　　C.　finished　 　D.　should have finished
１８.He did not pass the examination. As a good student,　he　　.
　　A.　mustn‘t have failed 　B.　may not have failed
　　C.　needn‘t have failed D.　shouldn't have failed
1 SAM: How can I grow thinner, Mum
MUM: Well, you __________ eat food with
plenty of fibre that helps you digest
better. And you__________ stop drinking cola or eating sweet food.
SAM: Does it mean I__________ eat. my favourite fried chicken any more
MUM: Not exactly, if you love fried chicken,
you __________ give it up. Just eat it less often. You__________ worry too much: a little fried chicken__________ do you good!
have to
should
shouldn’t
needn’t
don’t have to
will
2 DOCTOR: You are sick because you’ve eaten poisonous mushrooms. Where did you get them
LUCY: I picked them in the forest. I know we__________ eat fresh vegetables.
DOCTOR: Oh, you__________ eat them until you’re sure they are not poisonous.
LUCY: Thank you, doctor. I’ll be more careful next time.
3 CHARLES: I wish I could see things clearly in the dark.
TOM: Eating carrots__________ help you see better. You__________ eat some every day.
have to
mustn’t
ought to
should