高一年级必修三名词性从句语法专题（一）
主语从句（Noun Clauses as the Subject）I．Revision
What part does the underlined part serve as in each sentence?
A tree has fallen across the road. ____________
Y ou are a student. ____________
To find your way can be a problem. ____________
Smoking is bad for you. ____________
“How do you do?” is a greeting. ____________
What she said is not yet known. ____________
That we shall be late is certain. ____________
It is certain that we shall be late. ____________
II．Learning subjective clauses
Step 1划出主语从句, 初步识别主语从句
How you got me blind is still a mystery.
That she had won the first prize made the girl very happy.
When and where we will hold the meeting hasn’t been decided.
Whether we go by train or by boat makes no difference.
Who will host the meeting is still a serious problem.
Whoever comes to China is welcome..
Step 2 看以下的主语从句，总结主语从句的位置特点。
阅读第四单元的课文，分析下列文中的主语从句，并进行小组讨论。
1.What it was to become was uncertain until between 4.5 and 3.8 billion years ago.
2.What is even more important is that as the earth cooled down, water began to appear on
its surface.
3.What many scientists believe is that the continued presence of water allowed the earth to
dissolve harmful gases and acids into the oceans and seas.
4.Why they suddenly disappeared still remains a mystery.
5.So whether life will continue on the earth for millions of years to come will depend on
whether this problem will be solved.
先划分句子，归纳出主语从句所在的位置，
根据以上主语从句实例，_____________________________________
Step 3 学习主语从句的主要连接词
1）从属连词：that，whether
that引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。
That she left him cut him to the heart.
That he will come is certain.
Whether有词义，意为“是否”，但不担任任何句子成份，不能与if替换。
Whether it will please them is not easy to say.
Whether life exists on other planets is not clear.
2)连接代词who, what, which, whatever, whichever, whoever, 有词义，且在句中担任主语，宾语，表语或定语。
What seems easy to some people seems difficult to others.
Whose car runs faster should be tested.
Which side will win is not clear.
Whatever you do in the future is decided by yourself.
3)连接副词when, where, how, why,有词义，且在句中担任状语。
When they will start is not known yet.
Where he would go to study after graduation is still unknown to us.
How he became a great scientist is known to us all.
Why he did it remains a mystery.
Step 4总结主语从句的规则：给出一组实例，让学生进行讨论，总结出相应规则，并进行练习。
1. Where will the meeting be held is not decided.
Where the meeting will be held is not decided.
2. When will the work be finished is unknown.
When the work will be finished is unknown.
3. What will he do after graduation is a question.
What he will do after graduation is a question.
结论
_______________________________________________________
Exercises
1. _____ do shopping depends on the weather.
A. When will we
B. When we will
C. What will we
D. What we will 改写句子
1. When will the scientist give a report? It is still a question.
When _________________________________________.
2. Why is they earth becoming warmer? It is an important topic to scientists.
Why _______________________________________________.
Ⅲ单元语法巩固提高练习
一，用正确的关系词填空
1. _____ you don’t like him is none of my business.
2. _____ he said at the meeting astonished everybody present
