代词onethat的用法区别讲解

代替不可数名词时：

只能用that ,不能用one.

代替可数名词时：

可以用that,也可以用one .正式文体多用that,口语中用one.

代替表人的名词时：

单数一般用one ,复数则用ones或those 均可；

代替可数名词时：

当该名词有前位修饰语（前置定语）时，则:a).只能用one ,不能用that.

相关介绍

This is one of the most commonly used methods.

这是最常采用的方法之一。

There's only one sure way to do it.

做这件事只有一个保险的办法。

We had to work within the parameters that had already been established.

我们必须在已设定的范围内工作。

You could see from his face that he was lying.

从他的表情上你可以看出他在说假话。