七年级下册（2012年12月第1版）《Section C》最新PPT课件下载-南宁市优质课

I can fly a kite very well now. But twenty years ago, I couldn’t do it at all.

I can ride a bike very well now. But when I was 9, I could do it a little.

I can play ping-pong a little now. But I couldn’t do it before.

Ability

Now

In the past

Positive(肯定)

Negative （否定）

can+v

can’t+v

could+v

couldn’t+v

Guided discovery:

2. Look at the pictures and follow the example to make sentences.

Example:

…can … now , but … couldn’t …in the past .

two years ago

now

last year/this year

when I was five/now

a month ago/now

Do a survy.

Name

Can

Can’t

Could

Couldn’t

ride a bike

fly kites

ride a bike