初中英语句型分类知识点详解

1.who指人，在从句中做主语

　　(1)The boys who are playing football are from Class One.

　　(2)Yesterday I helped an old man who lost his way.

2. whom指人，在定语从句中充当宾语，常可省略。

　　(1) Mr. Liu is the person (whom) you talked about.

　　注意：关系代词whom在口语和非正式语体中常用who代替，可省略。

　　(3) The man who/whom you met just now is my friend.

3. which指物，在定语从句中做主语或者宾语，做宾语时可省略

　　(1) Football is a game which is liked by most boys. ( which 在句子中做主语)

　　(2) This is the pen (which) he bought yesterday. ( which 在句子中做宾语)

4. that指人时，相当于who或者whom;指物时，相当于which。

　　在宾语从句中做主语或者宾语，做宾语时可省略。

　　(5) The people that/who come to visit the city are all here. (在句子中做主语)

　　(6) Where is the man that/whom I saw this morning? (在句子中做宾语)

5. whose通常指人，也可指物，在定语从句中做定语

　　(1) He has a friend whose father is a doctor.

　　(2) I lived in a house whose roof has fallen in.

whose指物时，常用以下结构来代替

　　(3)The classroom whose door is broken will soon be repaired.

　　=The classroom the door of which is broken will soon be repaired.

　　(5)Do you like the book whose color is yellow?

　　=Do you like the book the color of which is yellow?

　　初中英语定语从句知识点：关系副词引导的定语从句

1.关系副词也可以引导定语从句

　　关系副词在从句中分别表示时间.地点或原因。关系副词when在从句中充当时间状语，where 充当地点状语，why充当原因状语。

2. that可引导定语从句表示时间.地点或原因

　　That有时可以代替关系副词 when, where 或者why引导定语从句表示时间.地点或原因，在 that引导的这种定语从句中，that也可以省去。

返回：初中英语知识点详解――定语从句篇

　　初中英语定语从句知识点：限制性定语从句与非限制性定语从句

1.二者差异比较

　　限制定语从句紧跟先行词，同先行词这间一般不加逗号，仅修饰先行词，可以由关系代词.关系副词或that来引导。非限制性定语从句仅作补充或说明，用逗号与主句隔开，既可修饰先行词，又可修饰整个主句，不可用that引导。

2.关系代词和关系副词的选择依据

　　弄清代替先行词的关系词在从句中作什么成分,作状语的应选用关系副词，作主语.宾语或表语的可选用关系代词。

3. 先行词与定语从句隔离

　　定语从句一般紧跟在先行词之后，但定语从句与先行词之间有时也会插入别的成分，构成先行词与定语从句的隔离。例如：

　　1) This is the article written by him that Is poke to you about.

　　2) He was the only person in this country who was invited.

　　初中英语定语从句知识点：As在定语从句中的用法

1. 引导限制性定语从句和非限制性定语从句

　　(1)as多与such 或the same连用，可以代替先行词是人或物的名词。

　　(2)as 也可单独使用，引导非限制性定语从句，作用相当于which。例如：

　　The elephant's nose is like a snake, as anybody can see.

　　(3)the same… that与 the same …as在意思上是不同的。

2.As引导的非限制性定语从句的.位置

　　as引导的非限制性定语从句位置较灵活，可以位于主句前面.中间或后面，一般用逗号与主句隔开，但which所引导的非限制性定语从句只能放在主句之后。例如：

　　(1) As is expected, the England team won the football match.

　　(2) The earth runs around the sun, as is known by everyone.

　　初中英语定语从句知识点：that在定语从句中的用法

(1)不用that的情况

　　(a) 在引导非限定性定语从句时。

　　(错)The tree, that is four hundred years old, Is very famous here.

　　(b) 介词后不能用。

　　We depend on the land from which we get our food.

　　We depend on the land that/which we get our food from.

(2) 只能用that作为定语从句的关系代词的情况