「语法」That-在从句中的各种用法

相信很多人对于「语法」That-在从句中的各种用法并不是非常的了解，因此小编在这里为您详解的讲解一下相关信息！

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:

①That she was able to come made us very happy.

她能来使我们很高兴.

②The news that our team has won the match is true.

我们队赢了这场比赛的消息是真的.

③The reason he didn’t come was that he was ill.

他没来的原因是他病了.

当that引导的主语从句或宾语从句太长时,常用it作形式主语或宾语而把that从句放在后面.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引导的宾语从句,一般可以省去that,但在下面情况中不能省略——

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引导的宾语从句,如果从句中还有其他状语从句,引导宾语从句的that不能省略.

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:

1、定语从句中缺主语,修饰人时用who /that,修饰物时用which /that引导.如:

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:

Gone are the days which /that we spent together in the village.

He is the man who /whom /that I think to be worthy of our praise.

3、用that不用which的七种情况:

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:

This is the best place that I have ever visited.

②先行词为little,much,all,none,few,(the)one,something,everything,nothing,anything等不定代词时,用that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:

He told us about the people and the cities that he had visited.

④先行词前有any,all,no,few,every,some,little,much,(the)very,(the)only,(the)last等词修饰时,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:

Which is the book that you bought yesterday

⑥先行词在从句中作表语时,常用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.

(文章来源：网络)