初中英语情态动词用法与归纳

Question

如题所述

Answer 1

1
中学英语情态动词用法归纳与练习

A
can / could = be able to

1
表示能力两种时态
can (could)
，其他时态要用
be able to
的形式

He can speak French.
Was/were able to
可以表示成功做成某事的含义
* managed to do / succeeded in doing

2
表示请求或许可

Could
比

Can
更加客气

Can I go now? Y
es, you can.
3
表示推测或可能性，常用于否定句和疑问句

Today is Sunday. He can't be at school.

Could have done
可用在肯定句中表示过去存在的可能性
* may have done
She could have gone out with some friends yesterday
.
Could have done
可以表示虚拟语气

,
某事可能发生（并没有发生）

It was silly to throw the TV out of the window. It could have hit somebody.
B may and might
的用法

1
表示请求和允许

类似用法
can could(
更加口语化
)
May I watch TV now?
Y
es, you may
.
2
表示可能性
;
猜测
might
比
may
更加不确定
may/might have done
对过去的揣测
*
May not
可能不；不可能；一定不可

3
表示祝愿

Wish you success! May you succeed!*
C must and have to
1
表示必须；一定要

可以用

have to
代替

must
现在；将来的必须

而且是主观看法
*
have to
有多种时态

而且强调客观情况

I really must stop smoking now.

I had to leave early because I wasn’t
feeling well.
Must I come here?
Y
es, you must. No, you needn’t. needn’t / don’t have to

must not

2 must
表示推测

意思非常肯定

“
一定是
”“
一定会
”

It must be raining outside.
Must have done
对过去
/
完成的推测
*
must have done, didn’t / hasn’t

Must be doing
推测现在正在进行

He must have gone over the article, hasn’t he?

D need and dare
过去时

dared

情态动词和实意动词的区别

A

人称变化

B do / to do
C
直接否定

/
间接否定

can
work
Need /dare
肯定句中，实义动词

She needs to do it. I dare to do it.
使用在否定句
,
疑问句中，情态动词，实义动词。

I dare not do it.
I don’t dare (to) do it.

I need not do it.
I don’t need to do it.

1 need
情态动词

无时态；人称的变化

多用于疑问句和否定句

Y
ou needn’t try to explain.

Needn’t = don’t have to

Needn’t have done
sth
过去本不必做某事
*
虚拟语气

3 dare
情态动词

过去时

dared
无人称的变化

多用在疑问句和否定句

Dare he tell them what he knows?
4 dare
实义动词

有时态；
人称的变化后接
to do
用于疑问句和否定句时

其后的
to
有时可省
略

Do you dare (to) jump off the high wall?
E will and would
1
表示征求对方
(
第二人称
)
意见或询问对方意愿

would
比
will
更客气委婉

Would
与

used to
的区别
*
Would
只能用来表示重复的动作而不能表示状态

Used to
既可表示动作也可表示状态
,
强调现在不如此

He used to be a university student.
2 shall
肯定句中

表示说话人强烈的感情

允许，命令，禁止和威胁

*

2
These rules shall be obeyed.

4 should
表示劝告，建议

= ought to
应该

You should wash your hands first.
Should
主要表示主观看法
*

Ought to
客观情况

法律、规定、义务的使用