内容正文:
Lesson 3 Grammar Focus
谮法练习
Whose volleyball is this?
It must be Carla's.She loves volleyball.
Whose hair band is this?
It could he Mei's hair band.Or it might belong to Linda.They both have long hair.
What did you see that night?
I'm not sure,but it can't be a dog.It was bigger.I think it might be a bear or a wolf.
语法详解
情态动词表推测的用法
1.表推测的情态动词
用于表示推测域表达可能性的情态动词有cam,could,may,might和must。其语气强弱顺序为:must>cn>could>may>might。.
表肯定的推测
mu“背定:一定”,一般只用于肯定句中
can/could/may/might“可能;或许”,其中can通常只用于否定句或疑问句,而could,may,.might均可用于背定句、
表可能的推测
香定句和疑问句中
表否定的推测
can't/couldn't“不可能”
注意:mustn''t意为“不准:禁止”,不表示否定的推测。如:
You mustn't go out alone at night.晚上你不能单独出去.
2.情态动词对不同时态的推测
用法
结构
例句
Jim might do his homework after school.
对现在或将米的情况进行推测
情态动词十动词原形
吉姆可能会在放学后做作业。
Jim might be doing his homework in the classroom.
对正在进行的情况进行推测
情态动词十be十动词一ing形式
吉姆可能正在教室里做作业。
Jim might have finished his homework.
对过去或己发生的情况进行推测
情态动词十have十动词过去分词
吉姆可能己经做完作业了。
一、单项填空
)1.Listen!I think it be Mrs.Li singing in the next room.
-It be her.I know she has already left for New York.
A.may;must
B.must;can't
C.must;mustn't
)2.Look!Mr.Li is playing basketball with his students.
-It be him.He has gone to Xi'an.
A.mustn't
B.can't
C.shouldn't
)3.Hey,whose basketball do you think this is?
-It belong to Linda.She likes playing basketball best in our class.
A.must
B.can
C.mustn't
D.can't
()4.There be a heavy snow last night.It's all white outside.
A.would
B.need
C.must
D.can
)5.-Listen,there is someone knocking at the door.Who could it be?
-I'm not sure.It
be a postman.
A.might
B.can't
C.must
D.shouldn't
二、完成句子
1.现在还不是回电话的最佳时间,这个点他一定还在睡觉。
It's not the best time to call him back.He
nW.
2.这只铅笔可能是汤姆的。This pen
Tom's.
3.他一定已经读了报纸上的新闻.
He
the news in the newspaper.
4.学生们不准在走廊上乱跑。
The students
about in the hallway.
5.她不可能这么早去学校。She to school so early..
三、小语篇选择
One evening,an old lady went shopping and bought some toys for her grandson,including a knife.When she came back to her car,she found two men in the
car.She realized that they 1 drive