人教版必修三英语 Unit4 Astronomy：the science of the stars lgrammar 主语从句-课件（共19张PPT）

Grammar
主语从句
1. That he will come is certain.
2. Whether it will please them is not easy to say.
3. What seems easy to some people seems difficult to others.
4. Which side will win is not clear.
5. Why he did it remains a mystery.
6. Whoever leaves the room last should turn off the light.
7. It is said that he has been admitted into Beijing University.
Find out the subject clauses in the following sentences, and translate them.
1. That he will come is certain.
2. Whether it will please them is not easy to say.
3. What seems easy to some people seems difficult to others.
4. Which side will win is not clear.
5. Why he did it remains a mystery.
6. Whoever leaves the room last should turn off the light.
7. It is said that he has been admitted into Beijing University.
Find out Conjunctions of Noun Clauses.
Conjunctions of Noun Clauses
(引导名词性从句的关联词):
从属连词
(不作成分）
连接代词
（作成分）
连接副词
（作状语）
what, who, whom, whose, which, whatever, whoever whichever
that, whether, if，
when, where, how, why
_____ he has become a rich man is known to all in our town.
A. Because B. That C. /
D. What
(2) ____ he will go to work in a mountain village surprises all of us.
A. What B. That
C. Whether D. Which
★that
没有意义，不充当句子成分，不能省略。
如何选择引导词？
That
That
(3) _______ it will rain or not is not clear.
A. Whenever B. If
C. Whether D. That
(4)_______ we’ll go camping tomorrow depends on the weather.
A. If B. Whether
C. That D. Where
★whether “是否”，常与or, or not连用。“if”不能放在句首引导主语从句。
如何选择引导词？
whether
whether
(5) ________ parents say and do has a life-long effect on their children.
A. Which???? B. What???? C. That? D. Whom
(6)______ was most important to her was her family.
A. What B. Why C. Where D. Which
(7) _____ life began on the earth is one of the biggest puzzles to scientists.
A. How B. What C. Where D. That
(8)________ makes mistakes must correct them.
A. whomever B. Whatever
C. Whoever D. Wherever
如何选择引导词？
What
What
How
whoever
“缺什么补什么”原则
缺主语，指人用who，指物用what
缺宾语，指人用whom/who，指物用what
缺时间状语用 when；
地点状语用 where；
原因状语用 why；
方式状语用 how；
定语用which
什么都不缺用that或whether（是否）。
Complete the sentences .
1.(_____ is needed for success) is your hard work.
3.(_________ we will go tomorrow )hasn’t been decided yet.
2.(_________they will arrive )has been told to the teacher.
4.(_____ can join in the sport meet) is decided by Mr. Li.
5.(________ it will rain or not) is not clear.
6.(______ the earth is a solid ball) is known to us all.
What
When/How
Where
Who
Whether
That
主语从句选连词时，
翻译句子
Conclusion:
“缺什么补什么”原则
7. (_______________climber gets to the top of mountain first )will get a 5,000$ prize.

whichever
找出下列句子中的错误，并总结规律
例1. When will he come is not known.
规律一、主语从句一律用陈述语序，
即主语在前，谓语在后。
正：When he will come is not known.
主语从句的规律1：
例2. He will not come to the meeting
this evening is true.
正：That he will not come to the
meeting this evening is true.
规律二、连词that 在从句中无实际意义，
但不能省略。
主语从句的规律2:
例3. If the meeting will be put off
has not been decided yet.
正： Whether the meeting will be put off
has not been decided yet.
规律三、whether 可以引导主语从句，
放在句首，但if不能
主语从句的规律3 ：
例4. That whether we will hold the sports meeting hasn’t been decided yet.
正：Whether we will hold the sports meeting hasn’t been decided yet.
.
规律四、主语从句中的连词不能重叠使用。
主语从句的规律4 ：
1. What he needs _____that book.
2. What he needs _____some books.
规律五、若主语是主语从句，谓语动词 一般用单数。但what 引导的主语从句，可根据表语决定主句谓语动词的单复数形式。
主语从句的规律5 ：
is
are
That the earth turns around the sun is known to all.

It is known to all that the earth turns
around the sun.
It is known to all that
主语从句为了避免头重脚轻现象,用 it 做形式主语，而把从句放在后面。
主语从句的规律6 ：
It is said that...
It is known to all that...
It is reported that...
It is believed that...
Conclusion:
____________________________　
*___________________(据报道)20 people were killed in the accident.
*______________________(根据建议)we should eat more vegetable and do more exercise.
It is reported that
It is suggested that
It做形式主语的常用句型，that从句为主语从句
It + be +过去分词+ that从句
据说……
众所周知……
据报道……
据信……;人们相信……

1、That we can’t go to see the movie on the
weekend is a pity.
2、That his memory was becoming worse worried
him a lot .
It is a pity that we can’t go to see the
movie on the weekend.
It worried him a lot that his memory
was becoming worse.
用it 作形式主语来改写下面的句子
It + be + 名词 ＋ that从句
It + 及物动词＋宾语+ that从句
3. That he is lying is obvious.
It is obvious that he is lying.
It + be ＋形容语+ that从句
1、That is widely believed that smoking can
cause cancer.
2、It is suggested that we will hold a
meeting next week .
改错
It（作形式主语）
解析：过去分词如果是suggested , ordered, requested 等表示建议，命令，请求等的词时，主语从句应用虚拟语气，即“(should) + 动词原形”
(should) hold
suggested
3.Where shall we spend the holiday hasn’t been decided yet.
4.You have made a mistake is a fact.

5. If the policeman will come is not certain.
6. That is certain that we can win.
7. It is ordered we should leave at once.
It is ordered that we should leave at once.
8. Where he comes from are a mystery.
9. What whether he likes the job is not clear.

we shall
Whether
It
That you have made a mistake is a fact.
is