(共46张PPT)
情态动词小试身手
情态动词
基本含义
推测含义
I have to lose weight to fit in my wedding dress.
But I can't stop eating!
情态动词有啥特点
As her friend, you said:
“Look, you must lose weight and you
should finish this task before the wedding
If you can't finish the task, you may
become a joke in your own wedding .
后接动词原形
无“三单”变化
不单独作谓语
5个情态动词 对应短语
现在式 过去式 can could be able to
must —— ——
may might have to
shall should ought to
will would be going to
注:过去式的情态动词不一定表示过去的时间;
can 【能力、可能】
Edward can read minds.
He is gentle but he can be violent sometimes.
can vs. be able to
I can read minds.
I'm able to read minds.
I have been able to read minds since l became a vampire.
能够... 时态
can 现在/过去
be able to 各种时态
A. can B. (be) able to
1. We can/are able to see the lake from our hotel.
2. I haven't been able to sleep very well recently.
could vs. was/were able to
could 一般能力 My parrot could dance to the rhythm of the music. was/were able to
特定情况的能力
I don't know where my parrot is.
But I was able to find him on the loudspeaker in the end.
检测:
A. could B. (was/were) able to
1. She used to be an agent. She could speak five languages.
2.Although the fire spread quickly, everybody was able to escape yesterday.
1.Samuel, the tallest boy in our class, easily reach the books on the top shelf.
A. must
B. should
C. can
D. need
1.Samuel, the tallest boy in our class, easily reach the books on the top shelf.
A. must
B. should
C. can
D. need
2.The fire spread through the hotel very quickly but everyone
get out.
A. had to
B. would
C. might
D. was able to
2.The fire spread through the hotel very quickly but everyone
get out.
A. had to
B. would
C. might
D. was able to
must 【必须】 vs. mustn’t 【禁止/不许】
You must promise you'll survive!
You mustn't give up!
must vs. have to
must 必须 (观点) The mid-term exam is coming. I must study hard now! have to不得不
(事实)
The mid-term exam is coming .
I have to study from 6:30 to
12:30 every day.
must vs. have to
My love letter was found and | ____ go to the teacher's office.
A.must
B.had to
C.have to
must:无过去时
have to: 用于各种时态
must vs. have to
My love letter was found and | ____ go to the teacher's office.
A.must
B.had to
C.have to
must:无过去时
have to: 用于各种时态
3.The new law states that people__ drive after drinking alcohol.
A.wouldn't
B.needn't
C.won't
D.mustn't
3.The new law states that people__ drive after drinking alcohol.
A.wouldn't
B.needn't
C.won't
D.mustn't
can must
①能力、可能 ②can(现在/过去) ③be able to(各种时态) was/were able to 成功地做某事 ①必须
②mustn't 禁止
③have to 不得不;
可用于各种时态
情态动词基本含义:
推测含义:
有把握 无把握
一定 可能
一定不 可能不
must 【一定….】
The movie must be very horrible, judging from their expressions.
can’t 【一定不...】
must nt )禁止
She can't be your girlfriend because she's my girlfriend.
有把握推测
有把握推测
情态动词
must 一定......
can't 一定不......
may/might 【可能.】
Put on your coat! You may catch a cold.
may not/ might not 【可能不….】
He may/might not be that into you.
he's just not that into you.
could 是什么意思 有无把握
《Chandler网恋事件》
Phoebe: Are you the cutest
Chandler: I'm afraid | might be.
Phoebe: You know. She could be like 90 years old, or it could be a guy.
Chandler: It's not a guy. I know her.
Phoebe: lt could be like a big giant guy
无把握推测
无把握推测
情态动词
may/might/could 可能...
may/might not 可能不...
小试牛刀:
A. might/may/could B. must
T: Why isn't John in class
S1: I don't really know. He A be sick. S2: He A be at the library. I guess.
The restaurant B be very good. It's always full of people.
情态动词推测含义:
A. can't; B.may/might not
The restaurant is always empty.
It B be good. I don't really know.
lt A be good. My friend told me the food there tasted bad.
4. You __ be hungry already. You had lunch only two hours ago!
A. wouldn't.
B. can't
C. mustn't
D. needn't
4. You __ be hungry already. You had lunch only two hours ago!
A. wouldn't.
B. can't
C. mustn't
D. needn't
5. -ls John coming by train
He should, but he __ not. He likes driving his car.
A.must
B.can
C.need
D.may
5. -ls John coming by train
He should, but he __ not. He likes driving his car.
A.must
B.can
C.need
D.may
must have done:一定做过...
S: Sorry, I left my homework at home.
T: You are lying!
He must have used the same excuse before.
can't /couldn't have done:一定没做过….
A: Do you know where Doris is
B: Well. She can't have gone far.
Her coffee is still warm.
may /might have done: 可能做过...
Doris can't find her bag
She might /may have left it in the classroom. Or she might /may have left it in the restroom.
有无把握 情态动词推测含义
有把握 must have done 一定做过...
can't /couldn't have done 一定没做过.….
无把握 may/might have done 可能做过….
may/might not have done 可能没做过
推测过去
6.-She looks very happy. She ____ have passed the exam.
- I guess so. lt's not difficult after all.
A. should
B. could
C. must
D. might
6.-She looks very happy. She ____ have passed the exam.
- I guess so. lt's not difficult after all.
A. should
B. could
C. must
D. might
7.--- heard they went skiing in the mountains last winter.
---lt___true because there was little snow there.
A.may not be
B.won't be
C.couldn't be
D.mustn't be
7.--- heard they went skiing in the mountains last winter.
---lt___true because there was little snow there.
A.may not be
B.won't be
C.couldn't be
D.mustn't be
Thank you!