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模块三 Module III Broardening horizons《Grammar and usage(1)： Noun clauses introduced by question words》精品PPT课件优质课下载
Whether he’ll be able to come is not yet known.
Why they have not left yet is unclear.
在句中作主语 句子 主语从句
Polly didn’t know which way she should go.
The price depends on how many you will buy.
I am sure that you looked beautiful that evening.
在动词、形容词、介词之后 宾语 句子 宾语从句
The truth is that the fog is too thick for the bus to run that far.
My question is whether Polly cam find her way home.
在系 / be动词之后 句子 表语从句
That fact that Polly didn’t ask for the man’s name is a pity.
The news that the plane had crashed made us sad.
在idea, fact, news, hope, belief, thought, doubt等等名词后面, 常常 用that或连接代词或副词引导从句, 对前面的名词起解释说明的作用. 同位语从句
名词性从句定义
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。
根据它在句中不同的语法功能，名词性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
一、主语从句
主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
用it 作形式主语的结构
A. It+be+形容词______________+that从句：
It is certain that she will do well in her exam.
B. It + be + 名词词组( a pity, a shame, a duty …) + that从句: