20. not ……at all ……是“根本不……”之意。

I don't know Mr. King at all.

David doesn't like singing at all.

21.keep sb. doing sth. 是“使某人继续做某事”之意。

Mr. Wang didn't come to school on time. She kept me waiting for two hours.

Don't keep your mother doing everything for you You should do it by yourself.

22. keep sth. + adj. 是“保持某物处于某种状况”之意。

Please keep our classroom clean and tidy.

That wool sweater kept her body warm enough.

23. see sb. doing sth. 表示“看见某人正在做某事”之意。

When my brother passed the post office, he saw a little boy crying at the door.

Did you see a car coming here ?

24. see sb. do sth. 是“看见某人做了某事”之意。

That girl saw an old woman fall down on the road yesterday.

Have you seen the leaves drop into the river ?

25. hear sb. doing sth. 是“听到某人正在做某事”之意。

Listen ! Can you hear someone singing on the hill?

We heard him talking with Mr. Li loudly just now.

26. hear sb. do sth. 表示“听见某人做了某事”之意。

He was often heard to sing in his room in the past.

Why didn't you hear me come into the sitting rom ?

27. be used for doing sth. 是“被用来做某事”的意思。

Knives are used for cutting things.

Teapot is used for keeping tea warm.

28. It's three metres long / high/ wide. 它是三米长(高、宽)形容词要放在后面作后置定语。句型是It / 主语+ be +数词+米/公里+形容词。

His father is one and seventy metres tall.

That river is fifty metres wide.

29. What's wrong with ......? / What's the problem with ......?/ What's the trouble with ......?/ What's the matter?表示“出了什么毛病?”“…哪儿不舒服?”“怎么啦?”的含义。

What's wrong with your car?

What's wrong with you, little girl?

What's the matter with your watch?

30. Would you like (to do) ......? 是“你想要…吗?”的意思。like后面可以接名词，词组或动词不定式。提出一种建议或邀请。

Would you like some fish?

Would you like to go to the cinema with me?

31. Will you please do sth? 是“你想要做……吗?”

Will you please say it more slowly?

Will you please not open the window? I feel cold.

32. It takes sb. some time to do sth. 是“做某事花费某人一段时间”之意。可以用于一般现在时，一般过去式和一般将来时态。

It will take us two hours to go over all the words and expressions.

It took Mr Wang half an hour to clean the bedroom.

33. I'd like sb. to do sth. 是“我希望某人来做某事”之意。

I'd like my friend to help me with my lessons.

He'd like Jim to teach him how to use the computer.