内容正文:
专题九情态动词A139
专题九情态动词
考点解读
>考点1
情态动词的基本用法
续表
词汇
含义及用法
示例
词汇
含义及用法
示例
意为“最好”,没有人
had
You'd better have a good
表示能力,“能:会”,其
I can play the guitar,but I
称和数的变化,后跟
better
rest.
否定式是cannot=cant
can't play the violin.
动词原形
表示请求,建议等,
Would you please pass me
can
表示允许,“可以”,“Can
wud比wil委婉,客气
the book?
1…?”意为“我可以…
Can I go home now?
will
would
I will never do that again.
表示意志、愿望和决
吗?”较口语化
They asked if we would
心等
come to see him,
是can的过去式,表示
Lucy could swim at the age
【辨析】must与have to
过去的能力
of five.
could
must意为“必须”,表示说话人的主观意志和看
could也可表示较can
Could you help me?
法:have to意为“不得不”,表示因客观原因,所以不
更为委婉的语气
得已而为之。
表示请求许可,意思是
【典例剖析】
“可以:可能”,其一般疑
问句的否定回答为
May I go out and play
(2020·新)My classmate is jumping so far!I
may
football?
(might)
mustn'tcan't。might是
believe my eyes.
y的过去式,语气比
No.you mustn't.
A.shouldn't
B.needn't
ny更委蜿
C.mustn't
D.can't
意为“应该”,表示按情
剖析句意:我的同学跳得这么远。我
You should go to see the
should
理应该如何,也可以表
相信自己的眼睛。shouldn't不应该:can't不能;
doctor.
示一种责任和义务
mustn't禁止:needn't不需要。根据句意“我的同学
表示义务、命令或要
跳得这么远”可知,应该是“我简直不能相信自己的眼
You must be careful next
求,意思是“必须:应
睛”。故选D
time.
该”,否定形式为
mustn't,意思是“不准,
You
mustn't take photos
心考点2情态动词表示推测的用法
here.
1.情态动词表示肯定推测的用法
不允许”,表示警告
词汇
含义及用法
示例
must
表示说话人的主观看法
I must go home now.
意为“也许”,语
对以must引导的一薇
may
Mr.Li may be at home.
Must I finish the homework
气一般
疑何句,肯定回答时用
today?
意为“或许”,语
She might have gone to the
must或have to:否定
might
-No,you needn't/don't have
气最弱
reading room.
回答时用needn't或
意为“很可能”,
The story book could be Li
don't have to
could
语气蛋于my
Ping's.He likes reading stories.
表示客观需要,意为
意为“必定,一
The book must be Lucy's.Her
have
“不得不:必领”,有人
He had to stay at home
must
定”,语气最强烈
name is on the cover.
to
称、时态和数的变化,
because of the heavy rain.
后跟动词原形
表可能性,时常
-Where can my pen be?
can
用在乘问句中
It may be in your desk.
意为“需要”,常用于
He needn't come here.
疑问句和否定句中
2.情态动词表示否定推测的用法
(1)can't表示否定推测,语气强烈,意为“一定不;
need
对以need引导的疑问
Need I go there tomorrow?
句,背定回答用must,
Yes,you must./No,you
不可能”。如:
否定回答用needn't
needn't.
That can't be Miss Gao.She has gone to Shanghai.