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
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
表示能力,“能:会”,其
I can play the guitar,but I
had
You'd better have a good
称和数的变化,后跟
否定式是cannot=cant
can't play the violin.
better
rest.
动词原形
表示允许,“可以”,“Can
表示请求,魂议等,
Would you please pass me
can
1…?”意为“我可以…
Can I go home now?
will
would比wi委婉,客气
the book?
I will never do that again.
吗?”较口语化
would
表示意志、愿望和决
They asked if we would
心第
是can的过去式,表示
Lucy could swim at the age
come to see him.
过去的能力
of five.
【辨析】must与have to
could
could也可表示较can
must意为“必须”,表示说话人的主观意志和看
Could you help me?
更为委婉的语气
法;have to意为“不得不”,表示因客观原因,所以不
表示请求许可,意思是
得已而为之。
“可以:可能”,其一般疑
【典例剖析】
问句的否定回答为
May I go out and play
may
(2o20·新疆)My classmate is jumping so far!I
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
nmy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
You
mustn't take photos
考点2情态动词表示推测的用法
mustn't,意思是“不准,
here.
不允许”,表示警告
1.情态动词表示肯定推测的用法
must
表示说话人的主观看法
I must go home now.
词汇
含义及用法
示例
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
气一搬
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
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
语气强于may
Ping's.He likes reading stories.
表示客观需要,意为
have
“不得不:必领”,有人
He had to stay at home
意为“必定,
The book must be Lucy's.Her
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
用在疑问句中
-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)cn'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.
那