名词性从句,就是指其作用相当于名词的从句,它包括主语从句、表语从句、宾语从句和同位语从句。下面,小编为大家分别讲解一下这下名词性从句:

  一、主语从句

  1. 引导词:主语从句就是在复合句中用作主语的从句,引导主语从句的引导词主要有三类:一是that;二是whether;三是那些可以用作疑问词的词语,如what, who, which, when, where, how, why等。如:

  That we shall be late is certain. 我们要晚了,这是确定无疑的。

  What he says is not important. 他说的话并不重要。

  Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。

  2. 形式主语:有时为了避免句子显得“头重脚轻”,可用it作形式主语放在句首,而把真正的主语放在句末。如:

  It’s a pity that he didn’t come. 很遗憾他没来。

  It was uncertain whether he could come or not. 他是否会来还不肯定。

  这三句句首的it均为形式主语,相应的真主语分别是that he didn’t come / what she did / whether he could come or not。

  二、表语从句

  表语从句就是在复合句中用作表语的从句。一般说来,可用于引导主语从句的引导词也可用于引导表语从句,如that, what, who, which, when, where, how, why, whether等。如:

  My idea is that we should do it right away. 我的意见是马上就干。

  That is what he meant. 这就是他的意思。

  The problem is how we can find him. 问题是我们如何找到他。

  另外,表语从句还可以用as if, as though, because等来引导。如:

  It is because he is too foolish. 那是因为他太蠢了。

  It is not as though we were poor. 又不是我们家里穷。

  三、宾语从句

  1. 引导词:宾语从句就是在复合句中用作宾语的从句。一般说来,可用于引导主语从句的引导词也可用于引导宾语从句,如that, what, who, which, when, where, how, why, whether等。如:

  We believe that he is honest. 我们相信他是诚实的。

  He asked when the train would get in. 他问火车什么时候进站。

  He asked who lived next door. 他问谁住在隔壁。

  She asked why he was silent. 她问他为什么一言不发。

相信同学们对名词性从句已将有了一定程度上的理解了,今后的学习和生活中,还有很多需要学习。收藏起来随时回顾吧~