文档介绍：Revision for Modal Verbs
Go for it!
九年级
1
● The basic uses of Modal Verbs
6、Dare

7、Need
8、ought to
9、三点说明
10、典型错误
1、Can / could
2、May / might
3、Must
4、Shall / should

5、will / would
2
1. Can
表示能力 The parrot can speak three languages.
表示允许 Can I borrow the book from the library.
表示可能性 Shanghai can be very cold in March.
Could 过去式;语气更委婉
2. Can 与 be able to
Can 表示习惯能力,
而be able to表示经过那里而做成了某事。
2. 在否定结构中,二者可以互换。
3. can./could + have +
、疑问句中表示“对过去发生行为
的可能性猜测。
2. 在肯定句中表示“本来可以做而未做”
The door was lacked. She couldn’t have been at home.
You could have been more careful.
3
1. May
表示可能性
表示允许
表示祝愿
Might 过去式;语气更委婉
2. may/might + have +
、肯定句中表示对过去动作的推测
“也许是……”
2. Might+have+,表“劝告、责备之意。”
Eg. 1. She may be still waiting for us.

2. May e in?
you have a happy holiday.
Eg.
1. He might have spoken to her yesterday.
2. You might have told me earlier.
4
1. Must
表示肯定的猜测,但只用于肯定句,
而mustn’t 表示“禁止、不准”
2. Must 、have to
与have got to
Must表示主观
Have to表示客观需求
Have got to 多见于口语
3. must + have +
对过去事情的肯定猜测。
Eg.
The road id wet. It must have rained last night.
5
1、Shall /should
1、第一、三人称疑问句中表示“请求
或征求对方意见。
Eg. Shall I get you a cup of coffee?
2、第二、三人称陈述句中
1、表示允诺
“会(得到)。
2、表示命令/警告
威胁“该回必须”
2、shall/should
+ have +
ought to
表示本应该做而未做。
should 过去式
语气更委婉
Eg.
You should have been five minutes ago.
6
Will/ would
1、表示意愿
I’ll try my best to e the difficulty.
2、表示意图
What will you do?
3、表示请示
Will you halp me to put these books in order?
4、表示习惯动作
She will sit for hours without saying a word.
Would 与 used to
1、Would 后只能接表示动作的动词。
2、used to 则还可以接表示状态的动词。
Eg.
He used to be a worker.
7
1、情态动词用于否定、疑问句;条件从句中。
eg.
1. Dare you go here alone?
2. How dare you do such foolish things?
3. I won’t allow you to swim in the river,
even if you dare do it.
Dare / dared
2 、做实意动词后加不定式。
eg.
I have never dared to tell him about it.
8
Need /needed
1、情态动词用于否定句,疑问句。
2、实意动词用法似dare,用作不定式。
3、need + n