十、名词性从句

种类 关联词 例 句 说 明 主

语

从

句 连

词 that That he will come and help you is certain.

他来帮助你是确实无疑的。 that在引导主语从句时不可省去 whether Whether there is life on the moon is an interesting question.

月球上有没有生命是个有趣的问题。 主语从句中只能用whether不可用if。 连接代词 who

what

which

whatever What he wants to tell us is not clear.

他要跟我们说什么，还不清楚。

Who will win the match is still unknown.

谁能赢得这场比赛还不得而知。

主语从句放在句首，句子常显得笨重，因此一般 连接副词 when

where

why

how It is known to us how he became a writer.

我们都知道他是如何成为一名作家的。

Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行，还没有宣布。 把它移到句子后面，前面用引导词"it"来作形式主语。