that引导的定语从句(that在从句中的用法和表示是怎样的)

that可以引导名词性从句、定语从句,其具体用法如下：

一、that引导名词性从句时(即主语从句、宾语从句、表语从句、同位语从句),在从句中无具体含义,只起连接作用,而且在从句中也不作任何句子成分.它所引导的从句的句子结构和意义是完整的,而且从句一般是陈述一个事实.

例如

①It is well—known that the earth is round.

众所周知,地球是圆的.

②We find it necessary that we practise spoken English every day.

我们发现每天练习英语口语很有必要.

注意：

that引导的主语从句,表语从句以及同位语中,that不能省略

.that

1.在suggest,order等表示命令、请求、建议等动词后的宾语从句中,不能省；

2.由and或but所连接的两个引导的宾语从句时,第一个从句中的that可以省,第二个从句中的that不能省；

3.that

Tell him that if he is at home,I'll call to see him.

二,that引导定语从句要注意以下几点

Is this the factory which /that makes TV sets

The man who /that visited our school is from Australia.

2.从句中缺宾语,修饰人时用 who /whom /that或省略引导词;修饰物时用which /that或省略引导词.如

①先行词前有形容词最高级或序数词修饰时,用 that不用which引导.如

There is nothing in the world that can frighten him.

③先行词既有指人的名词又有指物的名词时,用 that引导.如

This is the very coat that I need.

⑤先行词为which时,为了避免重复,用that引导.如

Shanghai is no longer the city that it used to be in the 1930's.

⑦当主句是There be...句型时,用that引导.

There are two tickets for the film that are for you two.