文档介绍：Read the sentences loudly.
1. What it was to e was uncertain.
2. The earth became so violent that it was not
clear whether the shape would last or not.
is even more important is that as the earth
cooled down, water began to appear on its surface.
4. It was not immediately obvious that water was to be
fundamental to the development of life.
5. What many scientists believe is that....
6. Why they suddenly disappeared still remains a
mystery.
7. Whether life will continue on the earth for millions of
years e will depend on whether this problem
can be solved.
1. What it was to e was uncertain
2. The earth became so violent that it was not clear whether the shape would last or not.
is even more important is that as the earth cooled down, water began to appear on its surface.
4. It was not immediately obvious that water was to be fundamental to the development of life.
5. What many scientists believe is that
6. Why they suddenly disappeared still remains a mystery.
7. Whether life will continue on the earth for millions of years e will depend on whether this problem can be solved.
主语从句
在句中充当主语的从句叫做主语从句。
主语从句典型错误
1:That she wants to know is which dress she should buy.
2: He will give up his job surprises all of us.
3: No matter who breaks the law will be punished.
4: If the meeting will be held in our school
is not known yet.
5: That worried her a bit was that he couldn’t get in touch with her friend.
6: He is said that he has gone to America.
What
That he
Whoever
Whether
What
It
注意:
What you left _______ only several old books.
What you said _______ of great importance.
Whether he’e here_______ not clear.
1.“if”不能引导主语从句,应有“whether”引导。
“that”一般不能省。
4.“what”引导主语从句时,谓语动词:
1)常与其后的名词作表语一致 2)根据句子的语境而定。
4. 主语从句需注意的问题

are
is
is
It + be + 形容词+ that从句
It is necessary that…有必要…
It is important that …. 重要的是…
It is obvious that……很明显……
It + be + -ed分词+ that从句
It is believed that…人们相信…
It is known to us/all that …. 众所周知…
It