文档介绍：高考英语语法名词性从句
高考英语语法名词性从句高考英语语法名词性从句名词性从句
名词性从句
引导名词性从句的关联词
在复合句中起名词作用的从句叫做名词性从句。推广所有定义。
连接代词 who, whom, whose, which, what,
whatever等
连接副词 how, why, when, where,
however, wherever等
单纯性连接词 that, whether, if, because
as if /as though（不充当从句的
任何成分）等
在名词性从句中一律用陈述句语序，即使从句表达的是疑问含义。其实所有的从句中都要用陈述句语序。
The problem is what he has done to the little boy.
1. 主语从句
在句中作主语的句子叫主语从句。
主语从句通常由单纯性连接词that，whether 和连接代词what, who, which, whatever, whoever等以及连接副词 how, when, where, why等引导。
that在从句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当成分。
Who will win the match is still unknown.
Where the English evening will be held has not yet been announced.
That he stole a bike was true.
What he wants to tell us is not clear.
单个的主语从句作主语时，谓语动词用单数形式。如果是两个或两个以上的主语从句作主语，谓语动词则用复数形式。
When he was born has not been found.
When the person was murdered and why he was murdered are still unknown.
有时为避免句子头重脚轻，常用it 代替主语从句作形式主语放句首，而把主语从句置句末。
It is known to us how he became a writer.
用it 作形式主语的结构
It is ＋ 名词 ＋ 从句
It is a good thing that…
It is a pity that…
It is an honor that …非常荣幸
It is common knowledge that…是常识
(2) It is ＋ 形容词 ＋ 从句 (多用 should)
It is natural/urgent/necessary/surprising/strange
that…