文档介绍：名词性从句
在句子中起名词作用的句子叫名词性从句(Noun Clauses)。名词性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。
根据从句在句子中的功能分
根据从句的性质分
定语从句
形容词性从句
主语从句
名词性从句
宾语从句
表语从句
同位语从句
状语从句
副词性从句
第一节知识点讲解
一.【主语从句】
顾名思义,主语从句在句子中作主语。有时本身出现在主语的位置上,也有时出于句子结构的考虑退到句子的尾部,前面用形式主语it代替。从句作主语时,谓语动词一般为单数形式。如:
What I saw was beyond any verbal description.
That his hair was turning grey worried him a bit.
Why pany denied the contract is still unknown.
When and where the government will build a city square is under discussion.
It is pretty annoying that a small part of the machine is missing.
It remains to be seen whether the new novel will be well received.
Tips: 主语从句的that绝对不能省去。因为句子是不能做主语的,故用that引导。若去掉则没有了主语,而宾语从句的that可省。
主语从句:That he is right is known to all of us.
宾语从句:We all know (that) he is right.
1. It 作形式主语和it引导强调句的比较
为了防止句子头重脚轻,通常把形式主语it放在主语位置,真正主语搁置于句末
It 作形式主语代替主语从句,主要是为了平衡句子结构,主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调,无论强调的是什么成分,都可用连词that。被强调部分指人时也可用who/whom。例如:
a) It is a pity that you didn’t go to see the film. 你不去看那场电影真可惜。
b) It doesn’t interest me whether you eed or not. 我对你成功与否不感兴趣。
c) It is in the morning that the murder took place. 谋杀案是在早上发生的。(强调句型)
d) It is John that broke the window. 是John打碎的窗户。(强调句型)
2. 用it 作形式主语的结构
(1) It is + 名词+ 从句
It is a fact that …事实是…
It is an honor that …非常荣幸
It mon knowledge that …是常识
(2)