主语从句引导词及用法总结
引导词:主语从句引导词有that、whether、whom、whose、who、whoever、what、whatever、which、whichever等。用法:主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。
主语从句引导词
从属连词:that,whether。
连接代词:whom,whose,who,whoever,what,whatever,which,whichever。
连接副词:why,when,whenever,where,wherever,how,however。
1、that引导。
例句:That you are coming to London is the best news I have heard this long time.你将来伦敦是好久以来我听到的最好消息。
引导主语从句的连词that有时可省,有时不能省,其原则是:若that引导的主语从句直接位于句首,则that不能省略;若that引导的主语从句位于句末,而在句首使用了形式主语it,则that可以省略。
例句:That you didn’t go to the talk was a pity.很遗憾你没去听报告。
2、whether引导。
例句:Whether they would come is still a question.他们会不会来还是一个问题。
3、连接代词引导。
例句:Whoever get the gold apple can be blessed by God.拿到这个金苹果的人,不管是谁,都会被神祝福。
4、连接副词引导。
例句:How this happended is now investigated by police.警察正在调查这件事是怎么发生的。
5、关系代词型what引导。
例句:What shocked me was that all of these children had no parents.我很震惊的是这些孩子都没有父母。
主语从句用法
主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。
1、It 作形式主语和it引导强调句的比较
①主语从句常用it作形式主语,一般常用句型为:It is+{名词/形容词/过去分词}+主语从句
例如:
It is still a question whether she will come or not.
It is strange that you should like him.
It is still unknown which team will win the match.
另外,还有一些比较多见的结构:
It turned out that……;
It has been proved that……;
It happened/occurred that……;
It is well-known that……等等
②而强调句则不同,它的结构是:It+be+被强调部分+that+从句
强调主语:It is the times that produce their heroes.时势造英雄
强调宾语:It is English that Prof.Lin teaches us.
强调状语:It was in shanghai that I saw the film.
判断是否是强调句有一个方法,就是将that以后的“句子的其余部分”拿出来单独看,看有没有缺成分,缺的是什么成分,再把谓语动词后面that前面的那部分,带到你认为缺成分的地方,如果放进去是一句完整的句子了,那就说明是强调句。
2、用it 作形式主语的结构
(1) It is +名词+that从句
It is a fact that … 事实是……
It is an honor that …非常荣幸
It is common knowledge that …是常识
(2) it is +形容词+that从句
It is natural that… 很自然……
It is strange that… 奇怪的是……
(3) it +不及物动词+that从句
It seems that… 似乎……
It happened that… 碰巧……
(4) it is+过去分词+that从句
It is reported that… 据报道……
It has been proved that… 已证实……
(4) 含主语从句的复合句是疑问句时,主语从句不可提前。例如:
Is it likely that it will rain in the evening?
4、What 与that 在引导主语从句时的区别What 引导主语从句时在从句中充当句子成分,如主语.宾语.表语,而that 则不然。
例如:What you said yesterday is right.