内容正文:
主语从句讲与练
一 概念
在复合句中充当主语的句子叫主语从句。主语从句主要由that, 和wh-词引导。
二 连接主语从句的连词
1)that, whether(if)
连接词that本身没有意义,不作句子成分, that不能省略;whether(if)尽管不充当句子成分,但是含有“是否”的意思,可以加上“or not”,其语意不变。若主语从句位于句首或和or not 连用时,则必须用连接词whether, 而不用 if。
Whether we'll go camping tomorrow depends on the weather.
2)what, who(m),which, whose, when, where, why, how
在这一类连接词中,除引导主语从句外,在从句中分别起代词、副词或形容词的作用,在从句中分别作主语、宾语、表语、状语和定语。因此,what,who(m),which称为连接代词;when, where, why, how称为连接副词;whose, which, what称为连接形容词。
Who will do it doesn't matter.(连接代词who在从句中作主语)
What we need is more water.(连接代词what在从句中作need的宾语)
Which of the two is better remains to be seen.(连接代词which在从句中作主语)
When we will start the work is an important question.(when在从句中作时间状语)
Where the library is to be built has not been decided yet.(where在从句中作地点状语)
Why she was late for school is quite clear now.(连接副词why在从句中作原因状语)
Which plan is better will be announced later.(which在从句中作名词plan的定语)
3)whatever, whoever, whomever, whichever
whatever等连接词与what等连接代词的用法一样,只是具有较强的语意,有“凡是、不管、无论”等意思