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必修3《Learning about Language》公开课PPT课件优质课下载
主语从句
What
What
that
Why
语法感知
4.The earth became so violent that it was not clear the shape would last or not. 5.It was not immediately obvious water was to be fundamental to the development of life.
whether
that
Tell “true” or “false” to see if the sentences are subject clauses
1.How life began on earth is one of the biggest puzzles .
2.Why is it wrong to show films with dinosaurs ?
3.When the plants grew into forests, reptiles appeared for the first time.
4. Whether life will continue on the earth for millions of years to come will depend on this problems
5.It’s possible that he has been to Beijing.
Difficult points:
类别
例词
说明（充当成分）
从属连词
连接代词
连接副词
1.主语从句的引导词
that，whether
两者在从句中均不作成分，只起连接作用；that无实义，whether表示“是否”。