替代：是指对句子中相同的非关键性词语用替代词来替代，从而避免重复的手段。

名词性替代

用名词替代词one(s), the same, the kind等所表示的替代现象叫做名词性替代，如:

The child doesn't like this book, show him a more interesting one.

There are good films as well as the bad ones.

A: I'd like a cup of coffee.

B: I'd like the same.

Can you give me a few nails? I need some.

We offered Jack a cup ofcoffee, but he didn't want any.

I didn't want any more food, I've had enough

Use this typewriter, all the others are being repaired.

使用替代方法时要注意的两种常见情况:

注意1. 不定冠词和物主代词通常不可以直接位于替代词one之前 。

Can I have a watermelon? I'd like a big one. √（I'd like a one. ×）

注意2. 在基数词one、two、three之后通常不可以用替代词one/ones。

You have four children, I have only two ones. ×

You have four children, I have only two. √

动词性替代

用动词替代词do, do so等所表示的替代现象叫做动词性替代。

A: Does Amandalook after them everyday？

B: She can't do in the weekdays.

A: Have they moved their furniture?

B: They have done the desks, but that's all so far.

Wendy looks very happy as she always used to do.

He said he would tell me the news, but he didn't do so.

The boys played doctors and nurses. We watched them doing so but they wanted us to do so, too.

分句性替代

用分句替代词so/not等替代整个分句的现象叫做分句性替代。

A: Do you think he'll come tomorrow？

B: Yes, I think so.

A: How do you know that he's leaving soon?

B: He told me so.

A: Are the girls coming to the party?

B: I'm sure they are.

We are told that he will come tonight, and if so, our meeting will be held tomorrow. If not, there won't be any meeting tomorrow.