内容正文:
Unit6 Grammar
Modal verbs
情态动词(modal verbs):表示说话人的语气或情态,如请求、命令、愿望、能力以及可能性等。
Modal verbs
can / can not
may / may not
must / must not
Modal verbs
情态动词
I can play basketball
well. Can you?
No, I can't. But I can swim fast.
I can sing beautiful
songs. Can you?
No, I can't. But
I can play kungfu.
Can you?
A. can and cannot
We use can and cannot(can't) to say we are able or not able to do things.
We can use electricity to do many things.
We cannot(can’t) see electricity.
Can you think of an example?
Yes, I can./ No, I cannot(can't).
Practice
1.Hi ______ play football.
2.Lo ________ paint pictures.
3.Hi _____ speak as many languages as Lo.
4.Both Hi and Lo______ dance.
5.Lo _____ drive a car, but he _____play chess.
6.Hi ____ swim, but he _______ play the guitar.
can
can't
can't
can
can't
can
can
can't
Practice
can/
could
能,能够,会
We can speak Chinese.
He can draw pictures.
许可
You can (=may) go home now.
表可能性,(不可能),难以置信
If it's raining tommorrow, the sports can take place indoors.
He couldn't (can't) be her father, for he's too young.
注意:could为can的过去式外,could还有表示语气婉转之义。
Could I come in?比Can I come in?更有礼貌。
但答语还用Yes, you can. /No, you can’t.
B. may and may not
We use may and may not to ask for and give permission(许可). We also use can and cannot (can't) for the same purpose.
May/Can I use you mobile phone?
Yes, you may/can.
No,you may not/can't.
How are you feeling, Daisy ?
Not very well.
Practice
_______ I get you a chair?
Yes, thanks.
May/Can
Practice
I'm going out. __________
I borrow your new bicycle?
Yes,you may. Before you go to meet your friends, can you come and see the doctor with me?
May
Practice
Yes, I____._____I carry your bag for you?
Yes,that's very kind of you, Benny. I 'm ready to go._____you open the door for me?
Yes, I can.
Thanks.
can
May
Can
Practice
may/
might
允许;请求
May I have a glass of water?
May you borrow me your pen?
可能;也许 (may比might语气强)
They may be in the library now.
He might be at home.
表示祝愿
May you always be young.
may