英语语法：表语从句的用法
导语： 表语从句在一个 复合句中，从句作的是主句的表语成分。下面我为您收集整理了英语表语从句的用法，希望对您有帮助!
表语从句的定义 表语从句是什么
表语从句的定义：
A. 表语从句就是用一个句子作为表语。说明主语是什么或者怎么样，由名词、形容词或相当于名词或形容词的词或短语充当，和连系动词一起构成谓语。
例句：The problem is when we can get a pay rise. 问题是，当我们可以得到加薪。
B. 连接表语从句的连接词有：that, what, who, when, where, which, why。例句：
He has become what he wanted to be ten years ago.
他已经成为了他10年前想成为的。
She has remained where I stood yesterday for an hour.
她一直在我昨天站的地方站了一个小时。
His suggestion is that we should stay calm.
他的建议是，我们应该保持冷静。
The question is when he can arrive at the hotel.
问题是，他什么时候可以到达酒店。
表语从句的.注意事项：
A. 表语从句一定要用陈述语序。
False: The question is when can he arrive at the hotel.
Right: The question is when he can arrive at the hotel.
B. 不可以用if，而用whether连接表语从句(as if 例外);
引导宾语从句时可以互换if/whether，位于介词后要用whether;
位于句首时要用whether;
引导表语从句，主语从句，同位语从句时要用whether。
False: The question is if the enemy is marching towards us.
Right: The question is whether the enemy is marching towards us.
Right: It looked as if he had understood this question.
C. 不像宾语从句，在有表语从句的复合句中，主句时态和从句时态可以不一致。
Right: The question is who will travel with me to Beijing tomorrow.
Right: The question is why he cried yesterday.
D. that在表语从句中不可以省掉。
表语从句的基本用法：
表语从句只能置于主句之后，而主句的动词只能是联系动词。
名词性从句在be等系动词后作表语时被称为表语从句，例如：
The problem is how we can get the things we need. 问题是我们怎样能弄到我们需要的东西。(how 在表语从句中充当方式状语)
The scissors are not what I need. 这把剪刀不是我所需要的。(what在表语从句中充当宾语)
What I told him was that I would find him a good play. 我告诉他的是我会给他找个好剧本。(what在主语从句中作直接宾语，that作为表语从句的引导词在该表语从句中不充当句子成分，不能省略)
That is what I want to tell you. 那就是我想要对你讲的。(what在表语从句中充当直接宾语)
That is why she failed to pass the exam. 那就是她考试不及格的原因。(why在表语从句中充当原因状语)
注意：“That is why...”是常用句型，意为“这就是……的原因/因此……”，其中why引导的名词性从句在句中作表语，该句型通常用于针对前面已经说明过的原因进行总结，又如：That is why you see this old woman before you know, Jeanne. 珍妮，这就是现在这个老太婆出现在你面前的原因。(前文提到Jeanne对老妇人显得苍老憔悴深感诧异，说话人对她讲述了其中的原因之后，用这一句来进行概括)。
下面是两个与“That is why...”形式相似的结构，它们与“That is why...”结构之间的关系要能够辨析清楚：
(1)“That is why...”与“That is the reason why...”同义，只不过从语法结构上讲，“That is the reason why...”中why引导的是—个定语从句，将其中的the reason去掉则与“That is why...”结构一样，例如：
That is (the reason) why I cannot agree. 这就是我不能同意的理由。
(2)“That is because...”句型中从属连词because引导的名词性从句在此作表语，这也是个常用句型，意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由，“That is why...”则指由于各种原因所造成的后果， 例如：
He did not see the film last night. That is because he had to help his little sister with her homework. 昨天晚上他没有去看电影，那是因为他得帮助他的妹妹做作业。(第一句话说明结果， 第二句话说明原因)
He had seen the film before. That is why he did not see it last night. 他以前曾看过那部电影，因此他昨天晚上没有去看。(第一句话说明原因，第二句话说明结果)
什么是主语从句,表语从句,他们的区别是什么
主谓宾,定状补.表语从句就是修饰名词的一个句子,一般THAT引导.
1． 定义：用作主语的从句叫做主语从句.
2． 构成：关联词+简单句
3． 引导主语从句的关联词有三类：
(1) 从属连词that.如：That they were in truth sisters was clear from the facial resemblance between them.
很明显,她们确是亲姐妹,她们的脸型很相似.
(2) 从属连词whether.如：
Whether he’ll come here isn’t clear.他是否会来这里还不清楚.
(3) 连接代词who,whom,whose,what,which,whoever,whatever,whichever
连接副词 where,when,how,why.如：
What she did is not yet known.她干了什么尚不清楚.
How this happened is not clear to anyone.这事怎样发生的,谁也不清楚.
Whoever comes is welcome.不论谁来都欢迎.
Wherever you are is my home ---- my only home.你所在的任何地方就是我的家----我唯一的家.
什么是表语从句
表语从句（Predicative Clause）就是用一个句子作为表语。说明主语是什么或者怎么样，由名词、形容词或相当于名词或形容词的词或短语充当表语。,表语从句的定义：,表语从句放在连系动词之后，充当复合句中的表语。,表语从句的构成：,关联词+简单句,引导表语从句的关联词的种类：,可接表语从句的连系动词有be，look，seem，sound，appear等。,China is no longer what she used to be.,今日的中国不再是过去的中国了。,The question remains whether they will be able to help us.,问题还是他们能否帮我们。,At that time，it seemed as if I couldn't think of the right word.,当时，我似乎怎么也想不出一个恰当的字眼来。,从属连词whether，as，as if / though引导的表语从句。,He looked just as he had looked ten years before.,他看起来还与十年前一样。,It sounds as if someone is knocking at the door.,听起来好像有人在敲门。,because，why引导的表语从句。,That's because he didn't understand me.,那是因为他没有理解我。（That's because…强调原因）,That's why he got angry with me.,那正是他对我生气的原因。（That's why…强调结果）,what引导的主语从句表示结果或名词reason作主语时，后面的表语从句表示原因时要用that引导，不宜用because.,The reason why I was sad was that he didn't understand me.,我难过的原因是他没有理解我。,连接代词who，whom，whose，what，which，whoever，whatever，whichever,连接副词 where，when，how，why,The problem is who we can get to replace her.,问题是我们能找到谁去替换她呢。,The question is how he did it.,问题是他是如何做此事的。,That was what she did this morning on reaching the attic.,那就是她今晨上了阁楼干的。,从属连词that,The trouble is that I have lost his address.,麻烦是我把他的地址丢了。,使用虚拟语气的表语从句,在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形”,表示，should可省略。常见的词有：advice，suggestion，order，proposal，plan，idea等。,My suggestion is that we （should） start early tomorrow.,我的建议是我们明天一早就出发。,应注意的问题：,连系动词be，appear，seem，look等之后可以跟表语从句。,It was because he didn't pass the exam.,那是因为他没有通过考试。,It seems（that）he was late for the train.,看来他没搭上火车。,It appears that she was wrong.,看来她错了。,It seems to me that we should answer for this.,在我看来，我们似乎应该对此事负责。,It appears to her that he wants to teach us all he has.,在她看来，他似乎要把他所会的都教给我们。,引导表语从句的引导词有以下几类。,wh-疑问词,My question is who left.,我想问的是谁离开了。,What I wonder is when he left.,我想知道他是何时离开的。,That's what he wants.,那是他想要的。,This is where they once lived.,这就是他们曾经住过的地方。,That is why he didn't e here.,这就是他为何没到这儿来的原因。,whether,My question is whether he left（or not）. ,我的问题是他是否离开了。,注：if不能引导表语从句。,that,The fact is that he left.,事实是他离开了。,注：引导表语从句的连词that间或可以省略。,The truth is（that）I didn't go there.,事实是我没去那儿。,because，as，as if，as though,It's just because he doesn't know her.,这是仅仅因为他不认识她。,Things are not always as they seem to be.,事物并不总是如其表象。,He looks as if he's tired.,他好像累了。
表语从句是什么？表语又是什么？举些例子在讲解下吧。
表语从句
一 定义：
A 表语从句就是用一个句子作为表语。说明主语是什么或者怎么[1]样，由名词、形容词或相当于名词或形容词的词或短语充当，和连系动词一起构成谓语。
The problem is puzzling. 主语 连系动词 形容词作表语
The problem is when we can get a pay rise. 主语 连系动词 一个句子作表语---表语从句
B 连接表语从句的连接词有：that, what, who, when, where, which, why,
whether,how.
He has become a teacher. He has become what he wanted to be ten years ago.
She has remained there for an hour. She has remained where I stood yesterday for an hour.
His suggestion is good. His suggestion is that we should stay calm.
The question is confusing. The question is when he can arrive at the hotel.
who will travel with me to Beijing tomorrow. why he cried yesterday.
how I can persuade her to join us in the party. whether the enemy is marching towards us.
二 注意：
A 表语从句一定要用陈述语序。
False: The question is when can he arrive at the hotel. Right: The question is when he can arrive at the hotel.
B 不可以用if，而用whether 连接表语从句(as if 例外)。
引导宾语从句时可以互换if/whether 位于介词后要用whether
位于句首时要用whether
引导表语从句，主语从句，同位语从句时要用whether
False: The question is if the enemy is marching towards us.
Right: The question is whether the enemy is marching towards us. Right: It looked as if he had understood this question
C 不像宾语从句，在有表语从句的复合句中，主句时态和从句时态可以不一致。
Right: The question is who will travel with me to Beijing tomorrow. Right: The question is why he cried yesterday.
D that在表语从句中不可以省掉。
表语从句的基本用法
表语从句只能置于主句之后，而主句的动词只能是联系动词。
名词性从句在be等系动词后作表语时被称为表语从句， 例如： The problem is how we can get the things we need.问题是我们怎样能弄到我们需要的东西。(how 在表语从句中充当方式状语)// The scissors are not what I need. 这把剪刀不是我所需要的。(what 在表语从句中充当宾语)// What I told him was that I would find him a good play. 我告诉他的是我会给他找个好剧本。(what在主语从句中作直接宾语， that作为表语从句的引导词在该表语从句中不充当句子成分， 不能省略)// That is what I want to tell you.那就是我想要对你讲的。(what在表语从句中充当直接宾语)// That is why she failed to pass the exam. 那就是她考试不及格的原因。(why 在表语从句中充当原因状语)
注意： “That is why...”是常用句型， 意为“这就是……的原因/因此……”， 其中why引导的名词性从句在句中作表语， 该句型通常用于针对前面已经说明过的原因进行总结， 又如： That is why you see this old woman before you know, Jeanne. 珍妮， 这就是现在这个老太婆出现在你面前的原因。(前文提到Jeanne对老妇人显得苍老憔悴深感诧异， 说话人对她讲述了其中的原因之后，用这一句来进行概括)。// That is why I came. 这就是我来的原因。
下面是两个与“That is why...”形式相似的结构， 它们与“That is why...”结构之间的关系要能够辨析清楚：
(1)“That is why...”与“That is the reason why...”同义， 只不过从语法结构上讲， “That is the reason why...”中why引导的是—个定语从句， 将其中的the reason去掉则与“That is why...”结构一样， 例如：
That is (the reason) why I cannot agree. 这就是我不能同意的理由。
(2)“That is because...”句型中从属连词because引导的名词性从句在此作表语， 这也是个常用句型， 意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由， “That is why...”则指由于各种原因所造成的后果， 例如：
He did not see the film last night. That is because he had to help his little sister with her homework.昨天晚上他没有去看电影， 那是因为他得帮助他的妹妹做作业。(第一句话说明结果， 第二句话说明原因)
He had seen the film before. That is why he did not see it last night.他以前曾看过那部电影， 因此他昨天晚上没有去看。(第一句话说明原因， 第二句话说明结果)
介绍一下主语从句和表语从句？？
个人分数
表语从句定义：在一个复合句中，从句作的是主语的表语成分。在复合句中充当主语成分的句子叫做主语从句.
表语从句和主从都是名词性从句，简单地说如果在be动词后的表语一般是由名词或形容词来充当，如果是一个句子的话，那么这个句子就是表从，同理，主语由句子来充当的那就是主从，名词性从句就是有位置和成分来判断的
什么是表语从句，怎么判断
表语从句（Predicative Clause）就是用一个句子作为表语。说明主语是什么，由名词、形容词或相当于名词或形容词的词或短语充当表语。表语是用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、形容词、副词、介词短语、不定式、动词的-ing、从句来充当，它常位于系动词（be, become, appear, seem,look,sound,feel,get,smell等词）之后。如果句子的表语也是由一个句子充当的，那么这个充当表语的句子就叫做表语从句。
表语从句是什么?
就是把表语用句子代替!
表语从句用法小结
一、表语从句的定义：
表语从句放在连系动词之后,充当复合句中的表语.
二、表语从句的构成：
关联词+简单句
三、引导表语从句的关联词的种类：
1.可接表语从句的连系动词有be,look,seem,sound,appear等.
China is no longer what she used to be.
今日的中国不再是过去的中国了.
The question remains whether they will be able to help us.
问题还是他们能否帮我们.
At that time,it seemed as if I couldn't think of the right word.
当时,我似乎怎么也想不出一个恰当的字眼来.
2.从属连词whether,as,as if / though引导的表语从句.
He looked just as he had looked ten years before.
他看起来还与十年前一样.
It sounds as if someone is knocking at the door.
听起来好像有人在敲门.
3.because,why引导的表语从句.
That's because he didn't understand me.
那是因为他没有理解我.（That's because…强调原因）
That's why he got angry with me.
那正是他对我生气的原因.（That's why…强调结果）
what引导的主语从句表示结果或名词reason作主语时,后面的表语从句表示原因时要用that引导,不宜用because.
The reason why I was sad was that he didn't understand me.
我难过的原因是他没有理解我.
4.连接代词who,whom,whose,what,which,whoever,whatever,whichever
连接副词 where,when,how,why
The problem is who we can get to replace her.
问题是我们能找到谁去替换她呢.
The question is how he did it.
问题是他是如何做此事的.
That was what she did this morning on reaching the attic.
那就是她今晨上了阁楼干的.
5.从属连词that
The trouble is that I have lost his address.
麻烦是我把他的地址丢了.
6.使用虚拟语气的表语从句
在表示建议、劝告、命令含义的名词后的表语从句,谓语动词需用“should+动词原形”
表示,should可省略.常见的词有：advice,suggestion,order,proposal,plan,idea等.
My suggestion is that we （should） start early tomorrow.
我的建议是我们明天一早就出发.
四、应注意的问题：
1.连系动词be,appear,seem,look等之后可以跟表语从句.
It was because he didn't pass the exam.
那是因为他没有通过考试.
It seems（that）he was late for the train.
看来他没搭上火车.
It appears that she was wrong.
看来她错了.
It seems to me that we should answer for this.
在我看来,我们似乎应该对此事负责.
It appears to her that he wants to teach us all he has.
在她看来,他似乎要把他所会的都教给我们.
2.引导表语从句的引导词有以下几类.
1）wh-疑问词
My question is who left.
我想问的是谁离开了.
What I wonder is when he left.
我想知道他是何时离开的.
That's what he wants.
那是他想要的.
This is where they once lived.
这就是他们曾经住过的地方.
That is why he didn't come here.这就是他为何没到这儿来的原因.
2）whether
My question is whether he left（or not）.我的问题是他是否离开了.
注：if不能引导表语从句.
3）that
The fact is that he left.事实是他离开了.
注：引导表语从句的连词that间或可以省略.
The truth is（that）I didn't go there.事实是我没去那儿.
4）because,as,as if,as though
It's just because he doesn't know her.这是仅仅因为他不认识她.
Things are not always as they seem to be.事物并不总是如其表象.
He looks as if he's tired.他好像累了.
表语从句是什么?
明白表语自然就明白表语从句是什么了。
表语是仅用在主系表结构中的成分，或可替代主语，或可说明主语在某一方面的属性。这一点我记得在前几天已经回答过一次了。
如：He is a student.这就是一个主系表机构，student就是表语。
而表语从句就是使用从句充当表语，构成主系表结构的复合句。而表语从句的连词一般使用名词性连词，如what等。
如 This is what we are doing these days.
其中what连接的从句就是一句典型的表语从句。
其实就像其他从句一样，表语从句就是用一句从句来代替原本简单句中的一个成分。
5.1 系动词
系动词亦称联系动词（Link Verb），作为系动词，它本身有词义，但不能单独用作谓语，后边必须跟表语（亦称补语），构成系表结构说明主语的状况、性质、特征等情况。
说明：
有些系动词又是实义动词，该动词表达实义时，有词义，可单独作谓语，例如：
He fell ill yesterday.
他昨天病了。（fell是系动词，后跟补足语，说明主语情况。）
He fell off the ladder.
他从梯子上摔下来。fell是实义动词，单独作谓语。
1）状态系动词
用来表示主语状态，只有be一词，例如：
He is a teacher. 他是一名教师。（is与补足语一起说明主语的身份。）
2）持续系动词
用来表示主语继续或保持一种状况或态度，主要有keep, rest, remain, stay, lie, stand, 例如：
He always kept silent at meeting. 他开会时总保持沉默。
This matter rests a mystery. 此事仍是一个谜。
3）表像系动词
用来表示"看起来像"这一概念，主要有seem, appear, look, 例如：
He looks tired. 他看起来很累。
He seems (to be) very sad. 他看起来很伤心。
4）感官系动词
感官系动词主要有feel, smell, sound, taste, 例如：
This kind of cloth feels very soft.
这种布手感很软。
This flower smells very sweet.
这朵花闻起来很香。
5）变化系动词
这些系动词表示主语变成什么样，变化系动词主要有become, grow, turn, fall, get, go, come, run.
例如：
He became mad after that. 自那之后，他疯了。
She grew rich within a short time. 她没多长时间就富了。
6）终止系动词
表示主语已终止动作，主要有prove, trun out, 表达"证实"，"变成"之意，例如：
The rumor proved false. 这谣言证实有假。
The search proved difficult. 搜查证实很难。
His plan turned out a success. 他的计划终于成功了。（turn out表终止性结果）
That is what I have said.就是一句表语从句
就是把表语用句子代替!
表语从句用法小结
一、表语从句的定义：
表语从句放在连系动词之后，充当复合句中的表语。
二、表语从句的构成：
关联词+简单句
三、引导表语从句的关联词的种类：
1.
可接表语从句的连系动词有be，look，seem，sound，appear等。
China
is
no
longer
what
she
used
to
be.
今日的中国不再是过去的中国了。
The
question
remains
whether
they
will
be
able
to
help
us.
问题还是他们能否帮我们。
At
that
time，it
seemed
as
if
Icouldn't
think
of
the
right
word.
当时，我似乎怎么也想不出一个恰当的字眼来。
2.
从属连词whether，as，as
if
/though引导的表语从句。
He
looked
just
as
he
had
looked
ten
years
before.
他看起来还与十年前一样。
It
sounds
as
if
someone
is
knocking
at
the
door.
听起来好像有人在敲门。
3.
because，why引导的表语从句。
That's
because
he
didn't
understand
me.
那是因为他没有理解我。（That's
because…强调原因）
That's
why
he
got
angry
with
me.
那正是他对我生气的原因。（That's
why…强调结果）
what引导的主语从句表示结果或名词reason作主语时，后面的表语从句表示原因时要用that引导，不宜用because.
The
reason
why
Iwas
sad
was
that
he
didn't
understand
me.
我难过的原因是他没有理解我。
4.
连接代词who，whom，whose，what，which，whoever，whatever，whichever
连接副词
where，when，how，why
The
problem
is
who
we
can
get
to
replace
her.
问题是我们能找到谁去替换她呢。
The
question
is
how
he
did
it.
问题是他是如何做此事的。
That
was
what
she
did
this
morning
on
reaching
the
attic.
那就是她今晨上了阁楼干的。
5.
从属连词that
The
trouble
is
that
Ihave
lost
his
address.
麻烦是我把他的地址丢了。
6.
使用虚拟语气的表语从句
在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形”
表示，should可省略。常见的词有：advice，suggestion，order，proposal，plan，idea等。
My
suggestion
is
that
we
（should）
start
early
tomorrow.
我的建议是我们明天一早就出发。
四、应注意的问题：
1.
连系动词be，appear，seem，look等之后可以跟表语从句。
It
was
because
he
didn't
pass
the
exam.
那是因为他没有通过考试。
It
seems（that）he
was
late
for
the
train.
看来他没搭上火车。
It
appears
that
she
was
wrong.
看来她错了。
It
seems
to
me
that
we
should
answer
for
this.
在我看来，我们似乎应该对此事负责。
It
appears
to
her
that
he
wants
to
teach
us
all
he
has.
在她看来，他似乎要把他所会的都教给我们。
2.
引导表语从句的引导词有以下几类。
1）wh-疑问词
My
question
is
who
left.
我想问的是谁离开了。
What
Iwonder
is
when
he
left.
我想知道他是何时离开的。
That's
what
he
wants.
那是他想要的。
This
is
where
they
once
lived.
这就是他们曾经住过的地方。
That
is
why
he
didn't
come
here.
这就是他为何没到这儿来的原因。
2）whether
My
question
is
whether
he
left（or
not）。
我的问题是他是否离开了。
注：if不能引导表语从句。
3）that
The
fact
is
that
he
left.
事实是他离开了。
注：引导表语从句的连词that间或可以省略。
The
truth
is（that）I
didn't
go
there.
事实是我没去那儿。
4）because，as，as
if，as
though
It's
just
because
he
doesn't
know
her.
这是仅仅因为他不认识她。
Things
are
not
always
as
they
seem
to
be.
事物并不总是如其表象。
He
looks
as
if
he's
tired.
他好像累了。
