定语从句的基本类型

1，限制性定语从句，即先行词与从句之间无逗号

China is a country which has a long history.

The meeting that you have missed yesterday was very important.

2，非限制性定语从句，即先行词与从句之间有逗号

His mother, who loves him very much, is strict with him.

They arrived at a farmhouse, in front of which sat a small boy.

3，分割式定语从句，即先行词与从句被一些词分开

A new teacher will come tomorrow who will teach you German.

I was the only person in my office who was invited.

4，带插入语定语从句，即定语从句的引导词与谓语之间有一插入语

He has made another discovery, which I think is very important to the world.

Edison made a lot of inventions, which I think are of great importance.

练习：识别下列定语从句

1,He left the money with his friend, which he believes was useful to him.

2,She sang the songs perfectly there yesterday which was written by me.

3,The boy who helped you yesterday is my neighbour.

4,This novel,which I have read three times,is very touching.

答案：1，非限制性，带插入语 2，分割式 3，限制性 4，非限制性