大学英语三级语法大全 名词性从句 在句子中起名词作用的句子叫名词从句 (Noun Clauses)
名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等,因此根据它在句中不同的语法功能,名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句
引导名词性从句的连接词 引导名词性从句的连接词可分为三类: 连接词:that, whether, if(不充当从句的任何成分) 连接代词:what, whatever, who, whoever, whom, whose, which
连接副词:when, where, how, why 不可省略的连词: 1
介词后的连词 2
引导主语从句和同位语从句的连词不可省略
What she was chosen made us very happy
We heard the news that our team had won
比较:whether 与 if 均为"是否"的意思
但在下列情况下,whether 不能被 if 取代: 1
whether 引导主语从句并在句首 2
引导表语从句 3
whether 从句作介词宾语 4
从句后有"or not" Whether he will come is not clear
大部分连接词引导的主语从句都可以置于句末,用 it 充当形式主语
It is not important who will go
It is still unknown which team will win the match
名词性wh-从句 1)由 wh-词引导的名词从句叫做名词性wh-从句
Wh-词包括 who, whom,
whose, whoever, what, whatever, which, whichever 等连接代词和 whe