名词性从句-主语从句.ppt

请君思考:
从句的特点?
名词性从句的类别?
名词性从句的连词有哪几大类?其特点?
能否举几个接形式宾语it的宾语从句?
那些动词的宾语从句需要虚拟?
表语从句的特殊关联词有哪些?
Whether和If的用法有哪些区别?
从句的解题步骤是什么?
Warming-up
Read and find out the sentences with a
subject clause in the reading passage?
1) What it was to e was uncertain until between and billion years ago when the dust settled into a solid globe.
2) . The earth became so violent that it was not clear whether the shape would last or not.
4) . What scientists think is that the earth was different because of …
6). Whether life will continue on the earth for millions of years e will depend on …
3) What is even more important is that as the earth cooled down, water began to appear on its surface.
5) Why they suddenly disappeared still remains a mystery.
共同特点:1)都有一个引导词
2) 引导词做句子成分??
3) 引导词有其汉语意思??
名词性从句的类别?
关联词有那几大类?
能否举几个接形式宾语it的宾语从句?
那些动词的宾语从句需要虚拟?
表语从句的特殊关联词有哪些?
一、名词性从句
Noun Clause
宾语从句
表语从句
主语从句
同位语从句
作用相当于名词
(三)、主语从句
Subject Clause
做主语用的名词性从句,因其在复合句中做主语,又称主语从句,
1. 从属连词that
1) That her hair was turning gray worried her a bit.
= It worried her a bit that her hair was turning gray.
2) puters have changed our life is known to everyone.
= It’s known to everyone puters have changed our life.
结论:that 无含义, 不做成分,但不能省。
2. 从属连词whether
Whether the headmaster will support us is a problem.
结论:whether 表“是否”,不可换成if
3. 连接代词what
1) What I can’t understand is why he is often absent from school.
2) What parents say and do has a life-long effect on their children. (07 陕西)
3) What matters most in learning English is enough practice. (07 全国)
结论:what “所…的”,在从句中做主、宾、表语成分。