定语从句专项讲解

●Why 指原因，在定语从句中作原因状语。先行词为reason 时，可用for which指代；当关系词在从句中作主语或宾语时，则用which或that 引导。如：

The reason why / for which / (that) he didn't attend the meeting was that he was ill.

I don't believe the reason (that/which) he gave me. （作宾语）

Have you asked him the reason that may explain his success? （作主语）

Ex.) He was late .That's because he got up late.

.He got up late. That's why he was late.(表语从句)

(the reason) why/for which he was late. (定语从句) 当先行词为way时，定语从句常用that, in which,或how引导，that常可以省略。 way后的定语从句 的引导词不用时较多。但如果关系词在句中作主语或宾语

时，则用which或that 引导。如:

This is the way (that) /in which I do such things.

比较: Please do the experiment in the way （that/which）I have shown you.

Ⅳ. 限制性定语从句与非限制性定语从句的区别：

1. 形式上，非限制性定语从句往往用逗号隔开。

2. 语法上，非限制性定语从句一般不用that.

3. 语义上，限制性定语从句与先行词关系紧密，起限定作用，如果去掉了这个定语从句，整个句子就不完整或者会改变意思；而非限制性定语从句与先行词关系不是很紧密，对先行词起补充说明或描述的作用。

This is the book I like best. 这就是我最喜欢的那本书。

Beijing, which has been China's capital for more than 800 years , is rich in cultural and historic relics. 北京是中国八百年之久的古都，它有着丰富的文化和历史遗产。

4. 翻译时，限制性定语从句可译为一句（较短的一般译为"的"字结构）；而非限制性定语从句可译为两句。（见上句翻译）

比较: He has a sister, who is a musician.

He has a sister who is a musician.

引导非限制性定语从句的关系代词，指人时用who, whom, whose , 指物时用which , whose; 关系副词when，where, why, etc.

1. He studied hard at school when he was young, which leads to his success in his later life.

2. Tom's father, who arrived just now, is a famous scientist.

3. They set up a separate state of their own, where they would be free to keep Negroes as slaves.

4. He was proud, which his brother never was.

Ⅴ. 几个易混淆的关系代词的比较:

●that & which:

在定语从句中，which 和that 在指代事物时，一般可以互换使用，但并非在任何情况下都是这样，这里介绍宜用that, 而不宜用which 的情况.

①先行词为不定代词,all,much,something,everything,anything,nothing,none,the one等,

1.We should do all that is useful to the people .

2.There's nothing that can be said about it .

3.Do you mean the one that was bought yesterday?

②先行词被only, any, few, little, no, just, very, one of等词修饰时。

1.The only thing that we could do was to wait.

2.That's the very word that is wrongly used.

The last place (that) we visited was the chemical works.