主语从句

3)连接副词when，where， how， why等。
Why he did it remains a mystery. When they will start is not known yet. How he became a great scientist is known to us all.
Noun Clauses ---The subject clause
By Debby
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Grammar
What part does the underlined part serve as in each sentence?
A tree has fallen across the road.
You are a student. To find your way can be a problem. Smoking is bad for you.
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“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.
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主语从句 （Noun Clauses as the Subject）
A. /
B. it
C. that D.
how
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1. _____ made the school proud was______ more than 90％ of the students had been admitted to key universities.
A. What; because B. What ; that
C. That ; what because
D. That ;
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2. ______ we will go camping tomorrow depends on the weather.
A. If
B. Whether
C. That D. Where
3 _______ that they can pass the written exam this time.
A. That is hoped B. It is hoped
C. It hopes D. That hopes
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5. ____ leaves the room last
ought to turn off the lights.
A. Anyone
B. The
p6be.erCis_no_gn_Ca.icscWehapotefevadecrtasthaant
2. That he will come and help us is certain.
3. Whether we will succeed is still a question.
注4.意It:is已n确ot定k的no事wn 由ifthhaet引wil导l ;come. 没决定的事由whether引导.
kWnhoewtnheyret. 4. ________ we’ll go camping
tWohmooervreorw depends on the weather. 5. ________ leaves the room last
ought to turn off 精品课件 the lights.
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百度文库
主语从句常用it作形式主语放句首
因而我们常见到这种句式： It+be+n./adj/-ed从句（that,
whether,etc.) 例：It's a pity that you should
have to leave. = That you should have to leave is a pity. It is great that I have a teacher like you. = That I have a t精品e课a件cher like you is
It doesn’t matter whether she will come or not.
It makes no difference where we shall have the meeting.
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3) It +及物动词（被动语态）+主语从句
It has been decided that the exhibition will not open on Sundays.
space.
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特殊句式
1.I hate ____ when people talk
with their mouths full．（MET98）
A. it
B. that
C. these
D. them
2. I feel ____ strange that he
should be so careless.
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Describe your mother with your partner.
Suggested structures: What my mother likes is_________________. What my mother doesn’t like is _____________________ Whether my mother would feel happy is _______________ Why my mother would be happy is _________________ Why my mother feels upsad is___________________精_品_课_件
English is D. Who
international language.
A. There
B.
This
C. That
D
D.
It
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7. ___ in the newspaper that
the price of food will go up.
A. It says B
B.
It is said
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2）It+不及物动词+主语从句 It seemed (happened, doesn’t matter, has turned out) that…
It happens that they were absent. It seems that Alice is not coming to the party at all.
8. It Cw.orIrtiehdashesraiad bit
D.
H_e__i_s__s_a_ihder hair was turning grey.
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4. what 与that 在引导主语从 句时的区别
what 引导主语从句时在句时在从句中充 当句子成分，如主语．宾语．表语，而that 则不然。例如：
1) What you said yesterday is righWhta.t在此引导主语从句,又做said的宾语
a con2Ts)hoaltTah只tai起to连ns.接h作e 用i,s不做s成ti分ll alive is 精品课件
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It is certain that she will do well in her exam. It is true that I told her everything. It is said that Mr. Green has arrived in Beijing. It is reported that China has sent another manmade earth satellite into orbit.
注意:
1）主语从句在句首时，必须由连接词引导， 不能省略这些连接词；但是如果用it做形式 主语，而把主语从句放在句末时，从属连词 that可以省略。
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4) . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用 \“should + 动词原形\”的形式, should 有时可以省略。
6. ___ is a fact that English is
beiIntg accepted as an international
language.
7.It worried her a tbhiatt ____ her hair
was turning grey.
8. The Foreign Minister saiIdt, “__
定义： 用作主语的从句叫主语从句，它
是名词性从句之一。引导主语从句的连接
词有：连词that, whether；连接代词 who, what和which；连接副词when, where, how和why。
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主语从句的连接词
1.连词that(无词义, 不作成分, 不能省 略);whether(是否),if不能位于句首。
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2.位置： 主语从句可以前置，也可 以后置。用it做形式主语，而把主语 从句，在句末，常用下面几种句型。
1）It + be + 表语 +主语从句 表语：（名词， 形容词，过去分词）
It is a fact (a shame, a pity, good news…)
It is still uncertain whether he is coming or not. It is an honour that I was invited to attend the meeting.
is our hope that the two sides will
work towards peace.”
9. After Yang Liwei succeeded in
circling wthhaet earth, ____ our
astronauts desire to do is walk in
2)连接代词who ，what ，which, whatever, whichever, whoever
充当成分，有具体意义
What seems easy to some people seems difficult to others. Which side will win is not clear.
5) 在It + be+suggested/advised/ordered/requested / insisted/required 中, that从句
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的谓语也应该用\“should + 动词原形\”
3. 主语从句需注意的问题 (1)主语从句中用陈述语序 What she is afraid of is their taking her to Paris. ( What is she afraid of … Wrong ) (2)主语从句后谓语动词用三人称单数 That they haven’t phoned is st(r3a)ntghea.t引导的主语从句中，that不可 被省略 That price will go up is certain.
1.Th_a_t___ you don’t like him is none of my business. 2. W_h_a_t__ he said at the meeting astonished everybody present 3. W_h_e_t_h_e_r__ the 2000 Olympic Games will be held in Beijing is not
practice
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改错练习
1.Where shall we spend the holiday isn’t we shall
2.You have made a mistake is a fact. That you have 3.That is certain that we can win. It is 4.No matter who leaves the room last ought to turn offWhtoheevelrights. 5.It is important that a student learns a foreign languasgheo.uld learn