如何区别同位语从句和定语从句（定语从句与同位语从句很相似）

如何区别同位语从句和定语从句（定语从句与同位语从句很相似）我们都知道上海是一个大城市。例句3：We all know the fact that Shanghai is a big city.例句2：The question which you asked is very difficult.你问的那个问题非常难。Which you asked 修饰 the question，指的是“你问的那个”，所以是定语从句。

英语中，定语从句和同位语从句很相似，都可以由that who which what where when why how 等引导。但是这两种从句还是有区别的，下面我们一起来学习一下。

1. 定语从句与先行词之间是修饰关系，这是定语从句的特征。

例句1：The boy who is standing under the tree is my brother.

站在树下的男孩是我的哥哥。

Who is standing under the tree 修饰the boy，指的是“站在树下的那个”，所以是定语从句。

例句2：The question which you asked is very difficult.

你问的那个问题非常难。

Which you asked 修饰 the question，指的是“你问的那个”，所以是定语从句。

2. 同位语从句与先行词之间是同位或同等关系，不存在修饰关系。

例句3：We all know the fact that Shanghai is a big city.

我们都知道上海是一个大城市。

Shanghai is a big city 与 fact 是相同的地位，不存在修饰关系，所以是同位语从句。

例句4：Mary refused Tom’s request that he come and visit their daughter after divorce.

玛丽拒绝了汤姆离婚后来看望他们女儿的请求。

通过以上学习，相信大家已经明白了定语从句和同位语从句的区别，那么下面几个句子中，哪些是定语从句，哪些是同位语从句呢？

1. The question what step we should take next is very important.

2. The important question is what step we should take next.

3. The question that you asked is very important.