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2021年1月30日发(作者：中国人民解放军军歌歌词)

系动词、助动词、情态动词

一、情态动词

(coul d):
能够、可能、可以；
may(might):
可以、可能；
must:
必须；
shall:
将会；
should:
应该；
wil l:
将会，
愿意；
would:
将会

2.
半情态 动词
(
后接动原，但否定和疑问句要借助
do)
：
have to
不得不，
had better
最好，
used to
过去常常

3.
情态动词无三单
(have to
除外
)
；不能单独使用，后接动词原形共同构成谓语

4. need
既可做实义动词又可做情态动词
(
作实义动词，后接
to do/doing,
否定
don
’
t need to do do/doi ng;
作情
态动词，后接动词原形，否定
needn
’
t do)
5.
表推测：
must be
一定是（语气最肯定）
，
can be
可能是，
may be
也许是（语气最不肯定）
；
can
’
t be
一定不是
（语气最肯定
,must be
的否定形式）


也许
(
副词
,
常用在句首
)
；
may be
也许是
(
谓语动词，用在句中
)

与
need
开头的一般疑问句，肯定回答用
must,
否定回答用
needn
’
t/don
’
t have to(
不必
).

开 头的一般疑问句，肯定回答用
may/can,
否定回答用
can
’
t/mustn
’
t.
二、系动词

1.
系动词后可接形容词。

2.
表示状态的系动词
be(am, is, are, was, were,been),keep ,stay,
表示感觉的半系动词
feel (
摸起来，感觉
),
look (
看起来
), smell (
闻起来
), sound (
听起来
),taste(
尝起来）
;
三、助动词

1.
助动词本身无词义或意义不完整，必须和实义动词共同构成谓语。

2.
常用的助动词：
be(am, is, are, was, were,bee n,being)
用于进行时态或被动语态；
do(does,did)
用于一般现< br>在时或一般过去时的否定句和疑问句；
have(has,had)
用于完成时态；will,shall,would,should
用于将来时态，
shall/shou ld
只能用于第一人称。


情态动词与系动词练习题

一、基础题

1.-Where's Mr Lee? I have something unusual to tell him. -You________ find him. He________ Japan.
A. may not; has gone to B. may not; has been to C. can't; has gone to D. can't; has been to
2.-Finish drawing a horse in ten minutes. OK?-Sorry. It________ in such a short time.
A. may do B. can't be done C. must do D. needn't be done
3.I have my own room in my house, so I________do what I want in it.
A. must B. have to C. need to D. can
4.________you mend my car? I______not start it.
A. Would; would B. Must; must C. Can; can D. May; may
5.________she ride when she was three years old?
A. Can B. Could C. Need D. May
6. The boy________answer this kind of hard questions one year ago.
A. can B. may C. could

is the man over there? Is it Mr Li?-No, it________be him. Mr Li is much taller.
A. mustn't B. may not C. can't D. needn't
8. -Listen! Someone is singing in the next room. Who________it be? Is it Wei Fang?
-No. It________be her. She is at school now.
A. will; may not B. must; mustn't C. may; can't D. may; won't
9. -Is Mr Hu in the reading room?-No, he________be there. He has gone to Tianjin.
A. mustn't B. needn't C. won't D. can't
10. ________you pass me a pen? I'd like to write down the telephone number.
A. Need B. Could
C. Must D. Should
二、提高题

1.-May I go to the cinema, Mum?-Certainly. But you________be back by 11 o'clock.

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