内容正文:
Unit 8 People and events
铁路部门年终总结汇报PPT
Grammar
1
不随主语变
后接动词原
变否加not
变疑要提前
I/you/he/she/we/they can play the piano.
She can play the piano.
She cannot play the piano.
Can you play the piano?
情态动词基本特征.
2
情态动词表能力.
Tom can play basketball.
Mike can make delicious cakes.
Lily can sing English song.
Tom could play basketball at five years old.
Translate.
Mike could make delicious cakes at twenty years old.
Lily could sing English song at 6 years old but now she cannot.
(1) can(否定式为can’t不能)
表示能力,“能;会”。
I can play the guitar.
(2) could(否定式为couldn’t不能)
can 的过去式,表示过去的能力。
Lily could swim at five years old.
3
Practice
—Do you know the song let it go?
—Yes, and I _________sing it well.
A. must B. can C. need D. should
I _____ play the piano, but my brother _____ do it.
A. can, can’t B. should, can C. can, can D. may, can’t
I _____ make homepage three years ago but now I ___make one.
can’t; can’t B. could, couldn’t C. couldn’t, can
— Linda, you look busy. Do you need any help?
— Thank you, Tom. But I ________ do it myself.
A. need B. might C. can D. may
4
情态动词表请求.
Mom, may I play computer games?
Could you please open the door?
Can I go out with my friends?
Translate.
强
弱
How to answer
肯定回答:Yes, sb. can.
否定回答:
No, sb. can’t.
No, sb. mustn’t.(危险情况禁止)
5
can
could
may
might
情态动词 例句 例句
can —Mum, it’s too hot. Can / Could / May I swim in the lake with my friends?
—Yes, you can. / Sorry, you can’t.
—Can / Could you lend me five pounds?
—Yes, I can. / Sorry, I can’t. 肯定回答:
could
may 否定回答:
might
Yes, sb. can.
No, sb. can’t.
No, sb. mustn’t.
(危险情况禁止)
当表示___________时,必须用______________
危险情形
mustn’t
6
Practice
— May I use your bike this afternoon, Peter?
— Oh, I’m afraid you ________. John and I will go cycling.
A. mustn’t B. can’t C. needn’t D. shouldn’t
—Wilson, ________ you help me carry the box upstairs?
—Sure, no problem.
A. could B. need C. should D. might
—_______