内容正文:
名词性从句
学习目标:
学生初步认识名词性从句的概念,并理解各类连接词的意义和用法。
学生能根据理论的学习,正确选择合适的引导词完成句子。
自主学习(理论知识梳理)
名词性从句思维流程:名词性从句相当于名词,可分别做主句的主语、宾语、表语和同位语,因此,名词性从句可以分为主语从句、表语从句、宾语从句和同位语从句。
主语从句(置于谓语动词前的句子)名词性从句
确定哪种从句 宾语从句(实意动词或介词后的句子)
表语从句(be动词或连系动词之后的句子)
同位语从句(特定名词后的句子,对名词内容进行解释说明)
______ we will start is not clear.
She won’t believe _____ her son has become a thief.
My idea is ___ we should do it now.
I have no idea ____ you were her friend.
一、引导名词性从句的连接词分类
引导名词性从句的连接词可分为三类:
引导词
用法
连词
that, whether, if等
均不在句子中作成分。that没有意义,引导宾语从句时可以省略;whether和if意为“是否”,在宾语从句中可互换使用,但在其他名词性从句中只用whether
连接代词
which, who, whom, what, whatever, whoever,
whichever等
在从句中作主语、宾语、表语或定语等成分
连接副词
when,where,why,how, whenever, wherever,
however等
在从句中作状语
二. 主语从句:作句子主语的从句叫主语从句。置于谓语动词前的句子。引导词经常在句首。
____ he wants to tell us is not clear.
____ will win the match is still unknown.
It is known to us____ he is a writer.
____the English evening will be held has not yet been announced.
______ he said at the meeting made us sad.
★有时为避免句子头重脚轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下:
(1)It + be + 名词 + that从句 It is a pity that you have missed the party.
(2)It + be + 形容词 + that从句It is important that we should study hard.
(3)It + be + 动词的过去分词 + that从句 It is said that
(4)It + 不及物动词 + that 从句 It doesn’t matter who you are but what you want to be.
另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时,谓语动词要用虚拟语气“(should) +do”,常用的句型有:
It is necessary (important, natural, strange, etc.) that …
It is suggested (requested, proposed, desired, etc.) that…(sb should do sth)
三、宾语从句
实意动词或介词后的句子
(1)主语+及物动词+宾语从句
主语+动词+介词+宾语从句
I know that he is an intelligent and hard-working boy.
He often thinks of how he can make his class vivid and lively.
(2)it 作形式宾语,宾语从句后置。常用谓语动词有make., think, feel, find, consider等。
I find it important that we should keep calm in danger.
(3)有些动词不能直接跟宾语从句,需要借助形式宾语it。常见的有like ,dis