表语从句放在连系动词之后，充当复合句中的表语。
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☞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） 原因）
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。 学习表语从句应该注意以下几点。 (1)通常只用that引导表语从句的情况。
①句子的主语为the reason时，表语从句采用that引导，表示原因，此时不用because。
☞The reason why she was ill was that she had eaten bad meat． 她生病的原因是她吃了变质的肉。
☞The result is that many of them become fat．结果是他们中许多人发胖了。 ☞Why we decided to put off the match is that the weather was too terrible．
②句子的主语为the result时，表语从句采用that引导。 ③由why引导的从句作主语时。
我们决定推迟比赛的原因是天气太糟糕了。
(2)as if/though引导的表语从句通常置于系动词look，seem，sound，be等后面；表语从句既可以采用虚拟语 气，也可采用直陈语气。
①It sounded as if somebody was knocking at/on the door．听起来好像有人在敲门。 ②She treats him as if he were a stranger．她待他如陌生人。
1. The ability to speak freely is ________ helps you get a job, hold a conversation or just buy the things you need. A.what
B.that
C.whether
D.how D.because; that
2. The reason ______ his coming to China is ______ he wants to study in China. A.that;that
B.why; because
C.for;that
3. —He is so delighted to make friends with Johnson. —Oh, I see. That’s _______ they have much in common. A.where
B.how
C.what
D.because
1.【2018·北京】11. Without his support, we wouldn’t be _________ we are now. A. how 【答案】C
【解析】考查名词性从句。句意：没有他的支持，我们是不会在现在这个位置的。how表方式，when表时间，where表地点，why表原因。“_________ we are now”是表语从句，结合句子的意思可知，该处指我们所处的位置，故该从句应用where引导。C选项正确。 点睛：表语从句是指一个句子充当表语，通俗的说就是系动词be后面接一个句子。连接表语从句的连接词有that，what，who，when，where，which，why，whether，how等。
B. when
C. where
D. why
1.【2018·江苏】By boat is the only way to get here, which is _______ we arrived. A. where 【答案】D
【解析】考查名词性从句。句意：乘船是到达这里唯一的途径，这就是我们如何到达的。分析which引导的非限定性定语从句可知，后面为表语从句。分析句意可知，这里用连接副词how引导表语从句，充当方式状语，表示“如何”。故选D。
2.【2016·北京】29. The most pleasant thing of the rainy season is ________ one can be entirely free from dust. A. what 【答案】B
【解析】句意：于吉最令人愉悦的就是人们可以完全不再受到沙尘的困扰。后面是陈述句。
B. that
C. whether
D. why
B. when
C. why
D. how
3.【2015·安徽】25.A ship in harbor is safe, but that’s not ______ ships are built for. A. what 【答案】A
【解析】句意：船停放在海港里是很安全的，但这并非建造船的目的。isn’t后跟从句作表语，表语从句中的for后缺少宾语，用what引导，what与for连用，表示目的。故选A。
B. whom
C. why
D. when
一 单句语法填空
1. A ship in harbor is safe, but that’s not _____ ships are built for.
2. “Every time you eat a sweet, drink green tea.” This is _____ my mother used to tell me. 3. ----What a mess! You are always so lazy!
----I’m not to blame, Mum. I am ______ you have made me.
4. As John Lennon once said, life is ______ happens to you while you are busy making other plans.
5. Grandma pointed to the hospital and said, “That’s _____ I was born.”
6. From space, the earth looks blue. This is _____ about seventy-one percent of its surface is covered by water.
7. The Peony Pavilion, a play written by Tang Xianzu, is _____ many people regard as the most romantic story in Chinese literature.
8. That company wants to reduce prices to increase its market share, and this is _____ we differ from it.
9. What is concerning us greatly is ____the workers held up in that area yesterday will be set free. 10. The problem is _____ we can improve our reading skills in such a short time.
二 单项选择题
1. We were both travelling across Europe, and that’s ______________ we first met. A.which
B.whether
C.when
D.whom
2. The great thing about music is ______________ it can bring people of different cultural backgrounds together. A.which
B.what
C.that
D.whether
3. —Are you a native of this town?
—I was born in New York, but this is ______________ I grew up. A.that A.what A.which
B.what B.That B.where
C.when C.how C.that
D.where D.where D.how
4. Richard swims three times a week after work. This is ______________ he keeps fit. 5. Home is ______________ we complain the most, but are often treated the best.
宾语从句与表语从句 宾语从句是用于谓语动词之后； 表语从句位于系动词，主要是be动词之后。 I think that he is a good man. The truth is that he studies hard. 考点七十三 表语从句
参考答案
高考考点问诊 1.答案：A
解析：考查表语从句 2.答案：C
解析：考查表语从句 3.答案：D
解析：考查表语从句 一 单句语法填空
1. what 句意：在港口的船是安全的，但是那并不是船被建造的目的。表语从句，从句缺少宾语且指事物，
故用what。
2. what 句意：“每次你吃糖果的时候，喝点绿茶。”这就是我妈妈过去常常告诉我的。表语从句，引导词
在从句中作宾语且表示事物，故用what。
3. what 句意：——真是太乱了！你总是这么懒惰！——妈妈，别责怪我。你使我成了现在这个样子的。
表语从句缺宾补，故用what。
4. what 句意：正如约翰·列侬曾经所说的那样：当你正在为生活疲于奔波时，生活已离你远去。表语从
句缺主语，故用what。
5. where 句意：奶奶指着那家医院说：“那就是我出生的地方。”表语从句，缺地点状语，故用where。 6. because 句意：从太空看，地球是蓝色的。这是因为地球表面大约71%都被水覆盖着。根据句意应该
用because引导表语从句。
7. what 句意：汤显祖所写的《牡丹亭》是很多中国人认为的汉语文学中最浪漫的故事。表语从句，从句
缺少宾语且指事物，故用what。
8. where 句意：那家公司想要通过降低价格来增加市场份额，这就是我们和它不同的地方。表语从句，
从句缺地点状语，故用where。
9. when/how/whether 句意：我们非常关心的是昨天被拦劫在那个地区的工人们什么时候/会怎样/是否会
被释放。表语从句，从句不缺任何成分，故填when，how或者whether。
10. what 句意：随着中国许多城市被厚厚的雾霾所笼罩，环境问题成了当今中国人最为关注的问题。表语
从句，从句缺少宾语且指事物，故用what。 二 单项选择题 1. C
【解析】考查表语从句。句意：我们都正在进行欧洲游，那是我们第一次见面的时候。is后面是表语从句，根据语境可知用when引导。故选C。 2. C
【解析】考查表语从句。句意：关于音乐的好处是它能将不同文化背景的人聚集在一起。is后面是表语从句，表语从句的内容和成分都是完整的，用that引导。故选C。 3. D
【解析】考查名词性从句。句意：我出生在纽约，但是这（城镇）是我生长的地方。根据句意，此处为表语从句，从句中缺少地点状语。故选D。 4. C
【解析】考查表语从句。句意：Richard下班后每周游泳三次。这是他保持健康的方式。is后面是表语从句，
从句不缺主宾表，缺少方式状语，用how引导表语从句。故选C。 5. B
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