内容正文:
情态动词小试身手
1
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: