Modal verbs (2)[下学期]

课件19张PPT。GrammarModal Verbs (2)Grammar
1. Must I finish my homework?
Yes,you _______.
No,you ________________________.

2.Need you go to school?
Yes,I _______.
No,I ____________

3.May I use your bike?
Yes,you _______.
No,you ______________________________.
mustneedn’t/don’t have tomustneedn’tmaymustn’t/can’t/you’d better notStep 1 Revision选词填空(can, may, must, could, might, be able to, will, shall, would, should, ought to, dare)
1. The ground is wet , it_____ have rained last night.
2. ---I heard they went skiing in the mountains last winter.
--It ____ (not) be true because there was little snow there.
3. --Is John coming by train?
--He should, but he ____ not. He likes driving.

4. A left luggage office is a place where bags ____ be left
for a short time, especially at a railway station.5. Sir, The maid has arrived. ____ she clean your
bedroom?mustcan’tmay canShall6. The boat turned over, but everyone _______
get onto the bank. 7. Johnny, you_________ (not) play with the knife;
you _______ hurt yourself. 8. If you listen to me, you _______ have some candies, dear. 9. You ____ have used my dictionary yesterday, I
didn’t use it then. 10. See who’s there! _____ it be Mary?11. The doctor said I ________ (not) go back to
the hospital; my leg is all right now. was able tomustn’tmayshallcouldCan needn’t12. Stop! I ______ (not) listen to your nonsense.won’t13. Without air and water, human beings _____ die.will14. The flowers are dead. You ______________
have watered them before. 15. When he was young, he ________ raise some
strange questions. 16. You know so much. I _____ say you once
received a good education. should/ought towoulddareStep 2 Need and Dareneed “必需” “需要” ;
--- Must I be here before 9 o’clock ?
--- No, you needn’t. (不能说: No, you mustn’t.)
--- Need I be here before 9 o’clock?
--- Yes, you must. (不能说: Yes, you need.)
注意: 1) need作情态动词, 多用于否定句, 疑问句中.在陈述句中,应
该用need的实义动词表达.
You need to be here before 9 o’clock.
2.) My computer broke down. It needed repairing.
= It needed to be repaired.

need doing / need to be done 某事需要被做
Nobody need to be afraid of catching the disease.
Nobody need be afraid of catching the disease.These dishes need be cleaned carefully.
These dishes need to be cleaned carefully.
These dishes need cleaning carefully.True or Falsedare (过去式 dared) “敢于…”He dare not go into the building even in the daytime.
How dare you ask me such a question?
If you dare say that again, you shall be punished.
注意:
dare作情态动词时,多用于否定句,疑问句,if条件句中
在肯定陈述句中, 要用dare的实义动词来表达 “敢于”.在实义动词dare的否定句中,可以省去后面的to.
He dare go into the building in the dark night.
He dares to go into the building in the dark night.
He doesn’t dare (to ) tell us the truth.
dare (过去式 dared) “敢于…”判断正误:
判断正误:
How dare you say such a thing?
How dare you to say such a thing?He daren’t to speak English before such a
crowd, did he?
He daren’t speak English before such a
crowd, dare he?Step 3 情态动词 + 完成式动词 (指过去的动作或情况)may / might have done sth. 可能做过(了)某事
can’t / couldn’t have done sth. 不可能做了某事
must have done sth. 准是做了某事
needn’t have done sth. 本不必做某事(实际上已做)
could have done sth. 本可以做某事 (实际上没做)
should have done sth. 本应该做某事 (实际上没做)
ought to have done sth. 本应该做某事 (实际上没做)
shouldn’t have done sth.本不应该做某事 (实际上已做)
oughtn’t to have done sth. 本不应该做某事 (实际上已做)
1.I heard that your dog died. It must have been very upsetting.
2.It might have been sold by the time we get there.
3. Jack couldn’t have arrived. Otherwise he would have telephoned me.
4.He shouldn’t /oughtn’t to have bought that car, it’s always breaking down.
5.We should/ought to have stood in the other queue, it went down quicker.
6. You needn’t have cleaned the windows. It wasn’t your duty.
情态动词+ 动词完成式
1). 地板很湿, 昨晚一定下雨了.
The ground is rather wet, so it _______________
last night, didn’t it?
2). 汤姆可能去上海了, 但我不是很肯定.
Tom _________________ to Shanghai, but I’m
still not sure about it.
3). 地板很干, 昨晚不可能下雨了。
The ground is very dry, so it ________________
last night .
4). 一定有人闯入了我们的卧室, 谁会这样做呢?
Someone must have broken into our bedroom.
Who _________________ it?must have rained may have gonecan’t have rainedcould have done 121). ---Mary has got mad and has been sent to the mental
hospital. Did you tell her boss?
--- Yes, but I ____________ her husband first.
A. shouldn’t have told B. should have told
C. must have told D. needn’t have told
2). He _________ full marks, but he was so careless as to
make a spelling mistake.
A. must have gained B. can have gained
C. could have gained D. must gain

C B3).--- Did you scold him for his mistake?
---Yes, but _____ it.
A. I’d rather not do B. I’d not better do
C. I’d rather not to have done
D. I’d rather not have done
D must have done
may/ might have done
can/ could have done
(用于否定和疑问句中) should / ought to have done
shouldn’t / oughtn’t to have done
could have done (用于肯定句中)
needn’t have done
would rather have done表“推测”表 “责备” “遗憾” summaryHe looks sleepy.
Last might, he must …
Last night, he may/might…
Last night, he couldn’t …
Last night, he ought to…
… Jump to conclusions(结论) work in pairs and make as many sentences as possible as to what may have happened, using modal verb + have + past participle .
e.g.
When I arrived at school today, there were papers all over the floor in the classroom.
Possible conclusions:
There may have been a break-in.
X (a student’s name) might have gone crazy and thrown the papers around.
Some students may have played a joke.
The headteacher must have been furious(狂怒的).Possible situations:
1.You were stuck in traffic for two hours.
2.You heard loud dance music coming from the staff room(教研室).
3.No students came to class.
4.When you walked in, all the students started laughing.
5.Y (a student’s name) was fifteen minutes late.

Choose one situation and jump to your conclusions. An instant role play (即兴角色表演) You are the monitor candidate for your class. You have just lost the election. You are speaking to one of your assistant.