(共19张PPT)
Grammar
主语从句
1.The man is looking at you.
2.You are a student.
3.To find your way is a problem.
4.Smoking is bad for you.
5.What you need is a book.
6.That Tom will come here excites me.
7.When they will turn up is uncertain.
8.It is a pity that you didn’t see him.
Find out the subject in the sentences.
用作主语的从句叫主语从句。
引导词
A:连词: that, whether,if
B: 连接代词: who, whose, whom, whoever, what, which等
C :连接副词: where, when,how, why
2. 有时用it作形式主语,将主语从句后置, 这样做是为了避免句子头重脚轻。
It is obvious (that) he doesn’t like the gift.
It is a surprise that he finished the work in such a short time.
It is reported that china had sent another spaceship.
It happened that he was out that day.
1) It+ be +名词+ 主从
2) It+ be + 形容词+ 主从
3) It+ be + 动词的过去分词+ 主从 (said, believed, reported, known, proved, …)
4) It + 不及物动词+ 主从
(seem,appear, happen…)
It 作形式主语的句型
what vs that
________ you lack is self-confidence.
_________ the famous will come to our school excites everyone.
that: 1)不作句子成分& 没有实际意义;
2)that引导的主从位于句首时,
that不能省略
what:1)作句子成分
2)有具体的意义
What
That
1)_______is important to us is enough time.
2)_______we can’t get seems better than _______we have.
3) It worries my sister _______she is getting a litter fat.
What
what
What
that
whether or if
1) __________we’ll go camping tomorrow depends on the weather.
2) It was doubtful ____________Tom really saw Mary.
3) ___________Tom really saw Mary was doubtful.
主语从句位于句首,只能用whether引导;
但如果用it作形式主语,
二把主从放在句末,也可以用if引导。
Whether
whether \ if
Whether
用适当的单词填空,使下列主语从句意思完整。
1. _______ he finished writing the composition in such a short time surprised us all.
2. _______________ we will go for an outing tomorrow remains unknown.
3. It is a pity ______ we won’t be able to go to the south to spend our summer holidays.
That
Whether / Where
that
4. _______ she is coming or not doesn’t matter too much.
5. _______ he came from still puzzles all of us.
6. It happened _____ I saw him yesterday.
7. It does not make any difference to me ______ you do.
Whether
Where
that
what
8. _____ was responsible for the accident is not yet clear.
9. ____________________ they will have the sports meet is still a question.
10. It doesn’t matter ______ she looks like.
Who
When/Where/Whether
what
1. Light travels faster than sound is common knowledge.
2. If she’s coming or not doesn’t matter much.
3. That the boy needs is a toy.
4. What were your problems a year ago has now become mine.
5. Where will the trees be planted is
uncertain.
That
Whether
What
the trees will
主语从句要用陈述句语序。
have
Correct the mistakes
6. No matter who breaks the rule will be punished.
7. When and where the meeting will be held still remain a question.
引导让步状语从句时二者可互换,但引导名词性从句时只能用whoever。
Whoever
主语从句表示单一概念时,谓语要用单数形式。
remains
7. It was requested that everyone
made a speech at the meeting.
在“It is requested / ordered / suggested + that从句”中,从句要用虚拟语气,即谓语用“should + 动词原形”,should可省略。
(should) make
We’ll be late.
It’s certain.
2. Is he coming or not ?
We don’t know.
3.When will you come back
It doesn’t matter.
Make sentences
Make sentences
It’s certain . we’ll be late.
Is he coming or not ? We don’t know.
When will you come back It doesn’t matter.
It’s certain that we will be late.
That we’ll be late is certain.
We don’t know whether he is coming or not.
Whether he is coming is not known.
When you will come back doesn’t matter.
It doesn’t matter when you will come back.
1. 他在找什么与你无关。
Translate the sentences by using subject clause
2. 他喜欢这种书,这件事非常有趣。
3. 他是否能来仍然是个问题。
What he is looking for is none of your business.
That he likes books of this kind is very interesting.
It remains a question whether he will be able to come.
5. 飞机何时起飞还没有宣布。
4. 他们哪一个是从监狱里逃跑的,仍然是个谜。
Which of them escaped from the prison is still a mystery.
When the plane is to take off has not been announced.
/ It has not been announced when the plane is to take off.
thank you