必修三unit4语法讲解主语从句 Grammar
爱迪生的名言-八十大寿贺词
Section Ⅲ Grammar — 主语从句
在主从复合句中，充当主语的从句，即为主语从句。
一、主语从句的连接词
1．连接词that和whether
(1)that在从句中不充当任何句子成分，只起连接作用，但不可省略。
①That
Whitney Houston died upset her fans all over the
world.
惠特尼·休斯顿的离世令全世界的粉丝感到难过。
(2)
whether在从句中不充当任何句子成分，起连接作用，意为“是否”，不可省略。
②Whether the plan will be carried out is still
unknown.
这个计划是否会实施还不知道。
即学即练1
1－1.完成句子
①她能来帮助我们使我们很高兴。
_________________________
made us very happy.
②他被选为(be chosen
as)志愿者(volunteer)让我们感到高兴。
____________________________ made us happy.
③我们明天是否举行派对取决于天气。
____________________________ depends on the
weather.
④(湖南高考)Everyone in the village is
very friendly. It doesn't matter ________ you have
lived there for a short or a long time.
A．why B．HowC．whether D．when
2．连接代词(who
，whose，whom，what，which，whichever，whoever,
whomever,
whatever
连接代词引导主语从句，在从句中可以作主语、宾语、表语或定语。
①Who will
take his place is not important.谁将代替他并不重要。
②Whoever breaks the law should be punished.
无论是谁只要违法就应该受到惩罚。
3．连接副词(when, where, how,
why等)
连接副词引导主语从句并在从句中作状语。
③When we will
have a meeting is an important question
[点津]
主语从句中连接词的选择标准：
ⅰ.根据连词在句子中所作的语法成分；
ⅱ.根据连接词在从句中的意义。
2－1.用连接代词或连接副词填空并写出它们在从句中所作的语法成分
①What
role he will play in the film hasn't been
known.______
②Why John was late for the class
has been unexplained._______
③Which part of
the country he will travel to needs
discussing.____
1
④Where cars will
be parked in the future is a question.______
⑤What surprises me most is that he is too
proud._____
⑥Whoever is interested in the
activity can sign your name._______
⑦(北京高考)____ makes the book so extraordinary is
the creative imagination of the writer.
A．That
B．WhatC．Who D．Which
⑧(上海高考)________
comes will be welcomed to the open-air concert.
A．Whatever B．WhoeverC．No matter what
D．No matter who
二、主语从句中用it作形式主语的结构
1．It＋
be＋形容词(obvious, true, natural, strange, etc.)＋主语从句
①It's obvious that they badly need
help.很明显，他们急需帮助。
2．It ＋ be＋名词词组(no wonder, an
honour, a pity, ano surprise, etc.)＋主语从句
②It's
a pity that you missed the film.你没有看那部电影真是太遗憾了。
3．It ＋be＋过去分词(said,
reported，thought，expected，proved, etc.)＋主语从句
③It is suggested that the meeting be put
off.有人建议会议延期召开。
4．It＋不及物动词(happen, seem,
appear, etc.)＋主语从句
④It seems that it is going
to rain.看起来好像要下雨。
5．It ＋ 及物动词＋宾语＋主语从句
⑤It
surprised him why they came to visit him suddenly.
让他吃惊的是他们为什么突然都来看他。
即学即练33－1.完成句子
①学生学好英语很重要。
___________________a student
(should) learn English well.
②我们队失掉了这场比赛真是意外。
_________________ our team lost the game.
③已经得到证实，你说的是对的。 __________________ what you
said is right.
④碰巧那年收成不好。
__________________ the harvest was bad that year.
⑤似乎他丢了什么东西。 ____________________he has lost
something.
3－2.句型转换
⑥That he suddenly fell
ill last month surprised us.
→________________
he_suddenly_fell_ill_last_month.
⑦Whether they
will sell the house is not yet decided.
→_____
___________yet_whether_they_will_sell_the_house.
⑧That the light travels in straight lines is
known to us all.
→_______________to_us_all_tha
t_the_light_travels_in_straight_lines.
⑨(陕西高考)It remains to be seen ________ the
newly formed committee's policy can be
put
into practice.
A．that B．WhichC．what
D．whether
⑩(江西高考)It suddenly occurred to him
________ he had left his keys in the office.
A．whether B．WhereC．which D．that
⑪(江苏高考)It was never clear ________ the man
hadn't reported the accident sooner.
A．that
B．HowC．when D．why
三、主语从句中应注意的问题
2
1．从句要用陈述语序
①How he succeeded is
still a puzzle.他是如何成功的仍然是个谜。
2．主谓一致
(1)从句作主语时，主句的谓语一般用单数形式。
②Where he will get
a job after graduation has puzzled him much.
毕业后到哪儿找份工作使他很困惑。
[点津]
what引导主语从句时，有时主句谓语动词应与主句中作表语的名词保持一致。
③What the
school needs much are books.这所学校最需要的是书。
(2)如果由
and连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或
多个连接词引导一个主语从
句时，谓语动词用单数。
④When they will start and where
they will go have not been decided yet.
他们将在什么时候动身以及要去哪里还没定下来。
即学即练4 单句改错
①When will we set off is still under
discussion.__________
②What he needs much are
money.___________
③When and where the meeting
will be held have not been decided.__________
④What can we not get seems better than what we
have.____________
⑤That the coal workers are
still alive are a wonder.____________
Ⅰ.用适当的连接词填空
1．It is a pity _____ we can't
go to see the movie on the weekend.
2．They
lost their way in the forest and ____ made matters
worse was ___ night began to fall.
3．________has helped to save the people in
difficulty is worth praising.
4．It doesn't
interest me _______you succeed or not.
5．_______ Zhai Zhigang ate his food in space
is _______ we want to know.
6．___they will
have the sports meeting is still a question, for
they have so many things to do.
7．____ they
will talk about the matter won't make too much
difference. In fact, it is the
attitude not
the place that matters.
8．______he didn't come
yesterday is unknown.
9．_______ one is better
will be decided by yourself.
10．_______ will
be our English teacher in the new term hasn't been
decided yet.
Ⅱ.完成句子
1．____________(据报道)
some people stole others' money by ATM.
2．______________________(她生了一个健康的男婴) made the
family very happy.
3．________________
(父母是否给他买一个新的MP3) depends on his exam results.
4．________________(那是谁的包) was not known at
that time.
5．It remains a
mystery________dinosaurs_suddenly_disappeared
(为什么恐龙突然消失了)．
Ⅰ.单项填空
1．________ the
universe began with the “big bang” has been widely
accepted.
3
A．Whether
B．WhyC．That D．What
2．________ he
would like to offer his help or not makes no
difference to me.
A．That
B．WhatC．Whether D．If
3．It has been proved
________ having a balanced diet helps to keep
healthy.
A．if B．BecauseC．when
D．that
4．________ was not the way the event
happened.
A．Which the press reportedB．That the
press reported
C．What did the press
reportD．What the press reported
5．________ is
a fact that English is being accepted as an
international language.
A．There
B．ThisC．That D．It
6．—Mary looks down
is the matter?
—Well，________ happened between
Mary and me is none of your business.
A．wherever B．WhoeverC．whatever
D．whichever
7．________ their flight will
arrive on time is ________ they are concerned
about.
A．Whether; what B．Whether;
thatC．When; what D．How; that
8．________
matters most in learning English is enough
practice.
A．What B．WhyC．Where
D．Which
9．When and why he came here ________
yet.
A．is not known B．are not known
C．has not known D．have not been known
10．It is none of your business ________ other
people think about e yourself.
A．how
B．WhatC．why D．When
Ⅱ.用适当的连接词填空
Everyone knew __1__ Wendy was a famous writer,
but no one knew __2__ she came from
and __3__
she was born in 1961 was still a mystery. __4__
they did know was __5__ she was
loved by poor
people because she always helped __6__ was in need
of money. Wendy was
generous and helpful, but
some people thought she was chasing fame. Wendy
said she didn't
understand__7__ they were so
narrow-minded, but it didn't matter __8__ others
thought of her.
She just wanted to do __9__
she thought was right. I think that is __10__ the
meaning of life lies.
答案： r (ever)
(ever)
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