(完整版)表语从句讲解及专项练习、答案
表语从句讲解及专项练习
概念：表语从句是在复合句中作表语的名词性从句。
放在系动词之后,一般结构是“主语+系动词+表语从句”
可以接表语从句的连系动词有be, look, remain, seem等。
★ The trouble is that we are short of money.困难是我们资金短缺。
★ That is why stone walls are used instead of fences around New England fields.这就是为什么在新英格兰用石头墙而不用栅栏的原因。
★ At that time, it seemed as if I couldn't think of the right word anyhow.当时,我似乎怎么也想不出一个恰当的字眼来。
引导表语从句的词：
从属连词that、whether、as though、as if（That引导表语从句时，在口语中，间或可以省略。）
关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等；
关系副词when, where, why, how, however, whenever, wherever等。
※由从属连词that，whether引导的表语从句。
that在引导表语从句时无词义，而whether有词义，意为、“是否”。这时主句的主语常常是些抽象名词，如question(问题)，trouble(麻烦)，problem(问题)，result(结果)，chance(可能性)，suggestion(建议)，idea(想法)，reason(理由)等。表语从句对主句主语进行说明、解释，使主语的内容具体化。
例如：
★ The trouble is (that) she has lost his money. 麻烦的事是他丢了钱。
★The question is whether we need more ice cream.问题是我们是否还需要一些冰淇淋。
★The problem was that it was too valuable for everyday use.问题是它作为日常之用太贵重了。
★What she couldn’t understand w as that fewer and fewer students showed interest in her lessons. 我们不能理解越来越少的学生对他的课不感兴趣。
※由关系代词引导的表语从句。
关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等引导表语从句，在句中作主语、宾语、表语，关系代词不能省略。
例如：
★The question is which of us should go.问题是我们哪一个应该去。
★The problem was who could do the work.问题是谁能做这项工作。
★That's what he is worrying about.那就是他在担心的事。
★That's what we should do.那是我们应该做的。
※由关系副词引导的表语从句。
关系副词when, where, how, why 除在句子起连接作用外，在从句中还充当时间，地点，方式或原因状语，本身具有词义。
例如：
★Go and get your coat. It's where you left it. 去把雨衣拿来。就在你原来放的地方。
★I had neither a raincoat nor an umbrella. That’s why I got wet through. 我们既没伞也没雨衣，这是我们淋湿的原因。
★That is how mice ruin many stores of grain every year.那就是老鼠是怎样每年损害大量粮食的。
★That is what he is worried about.那就是他所担心的。
※由连词because，as if/as though等引导的表语从句。
★It looked as if it was going to snow.看起来好像要下雪了。
★That's because we never thought of it.这是因为我们从未想过此事。
★It seems as if he didn’t know the answer.好像他不知道答案。
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。
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)
表语测试
1. The question is ________ we will have our sports meet next week.
A. that
B. if
C. when
D. whether
2．The reason why he failed is ________he was too careless.
A. because
B. that
C. for
D. because of
3. Go and get your coat. It’ s ________you left it
A. where
B. there
C. there where
D. where there
4．The problem is _________to take the place of Ted
A. who can we get
B. what we can get
C. who we can get
D. that we can get
5. What I want to know is ______ he likes the gift given by us.
A. that
B. if
C. whether
D.不填
6. The reason is_________ I missed the bus.
A. that
B. when
C. why
D. what
7. That is __ ___ we were late last time.
A. that
B. when
C. why
D. what
8. She looked _________ she were ten years younger.
A. that
B. like
C. as
D. as though
9.—I fell sick!
--I think it is _______ you are doing too much.
A. why
B. when
C. what
D. because
10. The reason why he hasn’t come is ___________.
A. because his mother is ill
B. because of his mother’s being ill
C. that his mother is ill
D. for his mother is ill
11. —He was born here.
-- That is _______ he likes the place so much.
A. that
B. what
C. why
D. how
12.That is ______ Lu Xun once lived.
A. what
B. where
C. that
D. why
13．_______your father wants to know is________ getting on with your studies.
A. What; how are you
B. That；how you are
C. How；that you are
D. What；how you are
14. The trouble is__________ we are short of tools.
A. what
B. that
C. how
D. why that
15. America was __________was first called “India” by Columbus.
A. what
B. where
C. the place
D. there where
16. China is becoming stronger and stronger. It is no longer_________ .
A. what it used to be
B. what it was used to being
C. what it used to being
D. what it was used to be
17. ________he really means is ________he disagrees with us.
A. What … that
B. That … what
C. What … what
D. That … what
18. The energy is ________ makes the cells able to do their work.
A. that
B. which
C. what
D. such
19 —I drove to Zhuhai for the air show last week.
—Is that_____ you had a few days off？
A. why B .what C. when D. where
20 .I had neither a raincoat nor an umbrella ____I got wet through.
A. It’s the reason
B. That’s why
C. There’s why
D. It’s how
21. See the flags on top of the building? That was ______ we did this morning.
A. when
B. which
C. where
D. what
22. --- Are you still thinking about yesterday’s game?
---Oh, that’s _____.
A. what makes me feel excited
B. whatever I feel excited about
C. how I feel about it
D. when I feel excited
23. What surprised me was not what he said but ______ he said it.
A. the way
B. in the way that
C. in the way
D. the way which
答案
1~5: DBACC
6~10 :ACDDC
11~15:CBDBA
16~20: AACAB
21~23: DAA
(完整版)地点状语从句用法及例题解析
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中考英语总复习状语从句经典例题含答案解析
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表语从句讲解及练习
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表语从句讲解及专项练习
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状语从句例题解析
状语从句解题例析 高考中涉及状语从句的题目非常多，几乎覆盖了所有的状语从句类型，其中多数需要对题干信息进行加工才能得出正确答案。从状语从句的特点来看，正确理解连接词的含义、把握句子的整体意义是答题的关键。笔者从连接词入手，结合高考试题，对状语从句进行分析，希望能提高同学们的解题能力。 一、状语从句中的连接词 状语从句分时间、地点、原因、条件、目的、结果、方式、比较、让步等9类。 时间状语从句的连接词有：when,while,as,before,after,since,till,until,as soon as,the moment,me minute,im-mediately(一……就)，instantly(一……就)，every time,each time,the firsttime,any time等； 地点状语从句的连接词有：where,wherever等； 原因状语从句的连接词有：becau-se,as,since(既然)，now that等； 条件状语从句的连接词有：un-less,if,once(一旦)，as long as(只要)，so long as(只要)，on condition that(条件是)，provided that(如果)等； 目的状语从句的连接词有：so that,in order that,in case(万一)，for fear that(以免)，lest(以免)等； 结果状语从句的连接词有：so that,so…that,such…that等； 方式状语从句的连接词有：as,asif,as though等； 比较状语从句的连接词有：as…as,so…as,than等； 让步状语从句的连接词有：althoug,though,as(尽管)，even if,even though,whoever,whatever,whenver,wherever,no matter what/who/when/where/how等。 二、解题例析 1．全面了解状语从句的知识，熟悉每个连接词的语义和用法，同时了解个别连接词的多种意思。 (1)as,since等连接词的用法比较灵活，既可以引导时间状语从句，又可以引导原因状语从句。 例1 “Y ou can't have thi s foot-ball back——you promise not to kick it at my cat again,”the old man said firmly. A．because B．since C．when D．where 解析：本题的主句意为“你不能把足球拿回去”，从句意为“你答应过不再用足球踢我的猫”。根据其逻辑，从句为原因状语从句，答案应为B(since在此处意为“既然”，而不是“自从”)。
表语从句讲解及专项练习、答案
表语从句讲解及专项练习 概念：表语从句是在复合句中作表语的名词性从句。 放在系动词之后,一般结构是“主语+系动词+表语从句” 可以接表语从句的连系动词有be, look, remain, seem等。 ★ The trouble is that we are short of money.困难是我们资金短缺。 ★ That is why stone walls are used instead of fences around New England fields.这就是为什么在新英格兰用石头墙而不用栅栏的原因。 ★ At that time, it seemed as if I couldn't think of the right word anyhow.当时,我似乎怎么也想不出一个恰当的字眼来。 引导表语从句的词： 从属连词that、whether、as though、as if（That引导表语从句时，在口语中，间或可以省略。） 关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等； 关系副词when, where, why, how, however, whenever, wherever等。 ※由从属连词that，whether引导的表语从句。 that在引导表语从句时无词义，而whether有词义，意为、“是否”。这时主句的主语常常是些抽象名词，如question(问题)，trouble(麻烦)，problem(问题)，result(结果)，chance(可能性)，suggestion(建议)，idea(想法)，reason(理由)等。表语从句对主句主语进行说明、解释，使主语的内容具体化。 例如： ★ The trouble is (that) she has lost his money. 麻烦的事是他丢了钱。 ★The question is whether we need more ice cream.问题是我们是否还需要一些冰淇淋。 ★The problem was that it was too valuable for everyday use.问题是它作为日常之用太贵重了。 ★What she couldn’t understand w as that fewer and fewer students showed interest in her lessons. 我们不能理解越来越少的学生对他的课不感兴趣。 ※由关系代词引导的表语从句。 关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等引导表语从句，在句中作主语、宾语、表语，关系代词不能省略。 例如： ★The question is which of us should go.问题是我们哪一个应该去。 ★The problem was who could do the work.问题是谁能做这项工作。 ★That's what he is worrying about.那就是他在担心的事。
状语从句练习题及答案详解
创作编号：BG7531400019813488897SX 创作者：别如克* 状语从句练习题 1. I had been looking for the book for two days____ I found it at last. a. until b. when c. before d. while 2. He punished his students ____ they did anything wrong. a. however b. whenever c. whatever d. whichever 3. Those passengers will wait here____ the bus arrives. a. until b. because c. though d. as 4. Hardly had we reached home ____ it began to rain. a. before b. than c. as soon as d. when 5. No sooner had we arrived at the cinema___ the film began. a. than b. before c. when d. as soon as 6. You can’t watch TV ____ you’ve finished your homework. a. since b. until c. as d. after 7. We had scarcely left our school____ the rain began. a. before b. than c. while d. when 8. We have never seen her again_____ she went to work in another city.
状语从句讲解及习题附答案
（一）状语从句概述 定义状语从句用作状语，是起副词作用的句子。 位置状语从句可以放在主句之前，也可以放在主句之后，时间、条件、原因和让步状语从句放在句首时需要用 逗号和主句隔开。 分类根据其作用可以分为时间、地点、原因、条件、目的、让步、方式和比较等状语从句。 作用它可以修饰谓语、非谓语动词、定语、状语和整个句子。 （二）状语从句详解 1. 时间状语从句 引导词用法示例 when 意为“当…的时候”。When 引导从句的谓语动词可以 是延续性动词，也可以是 瞬间动词。并且when有 时表示“就在那时”A liar is not believed when he speaks the truth.说谎者讲真话时也没有人相信。When he arrives, I’ll call you. When you laugh and smile, your body relaxes. while 意为“在…的时候，在…的 同时”。While引导从句的 谓语动词必须是延续性While I was standing at the window, I saw several boys running along the street.
的，发生时间较长，并强调主句和从句的动作同时发生（或者相对应）。While 有时还可以表示对比。While John was watching TV, his wife was cooking. as 意为“一边…一边…”。As 引导的动作是延续性的， 发生时间较短，一般用于 主句和从句动作同时发 生；as也可以强调一前一 后。The writer was angry as he was travelling on a train to London because someone had invaded his “space”. He smiled as he stood up. after 意为“在…之后”。表示主句 动作发生在从句动作之 后。主句与从句的动作时 间关系与before引导的从 句相反。With many hungry visitors waiting, don’t stay too long at your table after you have finished. If an early exit is necessary, you can leave after a scene is over. before 意为“在…之前”。引导的从 句不用否定形式的谓语， 并且当before引导的从句 位于主句之后，有时译成 “就，才”。当主句用将来时，You can’t watch TV before you finish your homework. Before it ended, the theatre was almost empty. My father had left for Canada
英语从句讲解
Simple sentence Compound sentence Complex sentence 从句：名词性从句（主语从句，宾语从句，表语从句，同位语从句） 形容词性从句(定语从句) 副词性从句（状语从句） 英语中六大从句用法总结 在句子中起名词作用的各种从句，统称为名词性从句 1.主语从句subjective clause 一般由what, who, which, why, how, when, which, whether…or…等引导，如果从句较长，谓语又较短，可用it作形式主语，而将从句放在句末。常见的句型有： It is self-evident that… 很明显的是 It goes without saying that… 不用说 It is asserted that．．．有人主张…… It is believed that．．．据信…… It is generally considered that．．．人们普遍认为…… It is hoped that．．．人们希望…… It is reported that．．．据报道…… It is said that．．．据说…… It is supposed that．．．据推测．．．
It is well-known that．．．众所周知…… It must be admitted that．．．必须承认…… It cannot be denie d that… 不可否认…… It must be pointed out that．．．需指出的是…… It was told that．．．据传…… It will be said that．．．有人会说…… It follows that… 由此可见 It is inappropriate that… ……是不合适的 2)what引导的主语从句表示“...的东西时”，一般不用it作形式主语。 What we lack is experience. 3)what, who, when, why, whether等词含有各自的疑问意义，但它们引导的主语从句，都用陈述语序。 How the plan is to be carried out should be discussed again. I did know why I felt like crying. 2.宾语从句objective clause 1）宾语从句可位于及物动词、介词和某些形容词后。连词that常可省略。介词后一般接疑问词引导的宾语从句。in
表语从句讲解及专项练习、答案
、 表语从句讲解及专项练习 概念：表语从句是在复合句中作表语的名词性从句。 放在系动词之后,一般结构是“主语+系动词+表语从句” 可以接表语从句的连系动词有be, look, remain, seem等。 " ★ The trouble is that we are short of money.困难是我们资金短缺。 ★ That is why stone walls are used instead of fences around New England fields.这就是为什么在新英格兰用石头墙而不用栅栏的原因。 ★ At that time, it seemed as if I couldn't think of the right word anyhow.当时,我似乎怎么也想不出一个恰当的字眼来。 引导表语从句的词： ' 从属连词that、whether、as though、 as if（That引导表语从句时，在口语中，间或可以省略。） 关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever 等； 关系副词when, where, why, how, however, whenever, wherever等。 ※ 由从属连词that，whether引导的表语从句。 that在引导表语从句时无词义，而whether有词义，意为、“是否”。这时主句的主语常常是些抽象名词，如question(问题)，trouble(麻烦)，problem(问题)，result(结果)，chance(可能性)，suggestion(建议)，idea(想法)，reason(理由)等。表语从句对主句主语进行说明、解释，使主语的内容具体化。 : 例如： ★ The trouble is (that) she has lost his money. 麻烦的事是他丢了钱。 ★ The question is whether we need more ice cream.问题是我们是否还需要一些冰淇淋。 ★ The problem was that it was too valuable for everyday use.问题是它作为日常之用太贵重了。 ★ What she couldn’t unde rstand was that fewer and fewer students showed interest in her lessons. 我们不能理解越来越少的学生对他的课不感兴趣。 ※ 由关系代词引导的表语从句。
最新状语从句经典例题
最新状语从句经典例题 一、初中英语状语从句 1．--Peter, please send us postcards we’ll know where you have visited. --No problem. A．but B．or C．for D．so 【答案】D 【解析】 句意：——彼得，请给我们及明星片，这样我们将会知道你参观过哪里。——没问题。but 但是，表示转折关系；or或者，表示选择；for为了，表示原因；so所以，表示结果。结合句意，前半句让彼得给我们及明信片，后半句知道彼得到哪里参观了，后一句是前一句的结果，故用连词so。故选D。 2．The Italian woman didn’t feel a culture shock____it was her first time to Shanghai. A．though B．since C．if D．when 【答案】A 【解析】 句意：这个意大利妇女没有感到一种文化冲击，尽管她是第一次来上海。A. though尽管； B. since自从； C. if 是否，如果； D. when当---时候；根据The Italian woman didn’t feel a culture shock这个意大利妇女没有感到一种文化冲击，和it was her first time to Shanghai.她是第一次来上海之间用though 引导让步关系状语从句；故选A 3．WeChat Pay makes our lives confident. ______ we want to pay for something, we just need to scan a QR code（扫描二维码）. A．When B．After C．Unless D．Until 【答案】A 【解析】 【详解】 A 本题考查连词辨析。句意：微信支付使我们的生活方便。当我们想为某物付钱时，我们只需要扫描二维码。A. When当……时候； B. After在……以后； C. Unless除非； D. Until 到……为止。综合句意可知，扫描二维码指的是当我们付钱时的动作，用关系副词when。故乡A。 4．Mrs. White walks a dog in the park nearby every morning it’s rainy or windy. A．since B．because C．unless D．until 【答案】C 【解析】 试题分析：句意：如果不刮风下雨，怀特夫人就会带狗到附近的公园散步。A.. since自从；B.. because因为；C.. unless如果不；D. .until直到……才。结合句意，故选C 考点：考查连词的用法。
表语从句讲解及专项练习、答案
表语从句讲解及专项练习 概念:表语从句是在复合句中作表语的名词性从句。 放在系动词之后,一般结构是“主语+系动词+表语从句” 可以接表语从句的连系动词有be, look, remain, seem等。 ★ The trouble is that we are short of money.困难是我们资金短缺。 ★ That is why stone walls are used instead of fences around New England fields.这就是为什么在新英格兰用石头墙而不用栅栏的原因。 ★ At that time, it seemed as if I couldn't think of the right word anyhow.当时,我似乎怎么也想不出一个恰当的字眼来。 引导表语从句的词: 从属连词that、whether、as though、as if(That引导表语从句时,在口语中,间或可以省略。) 关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等; 关系副词when, where, why, how, however, whenever, wherever等。 ※由从属连词that,whether引导的表语从句。 that在引导表语从句时无词义,而whether有词义,意为、“是否”。这时主 句的主语常常是些抽象名词,如question(问题),trouble(麻烦),problem(问 题),result(结果),chance(可能性), suggestion(建议),idea(想法),reason(理由)等。表语从句对主句主语进行说明、解释,使主语的内容具体化。
高中英语语法表语从句详解
高中英语表语从句详解 1、概述 用作表语的从句叫作表语从句，它位于主句中的连系动词之后。引导表语从句的词有从属连词that、whether、as though(if)；关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等；关系副词when, where, why, how, however, whenever, wherever等。可以接表语从句的连系动词由be, look, remain, seem等。That引导表语从句时，在口语中，间或可以省略。 The trouble is that we are short of money.困难是我们资金短缺。 That is why stone walls are used instead of fences around New England fields.这就是为什么在新英格兰用石头墙而不用栅栏的原因。 At that time, it seemed as if I couldn't think of the right word anyhow.当时,我似乎怎么也想不出一个恰当的字眼来。 2、由从属连词that，whether引导的表语从句。 that在引导表语从句时无词义，而whether有词义，意为、“是否”。这时主句的主语常常是些抽象名词，如question(问题)，trouble(麻烦)，problem(问题)，result(结果)，chance(可能性)，suggestion(建议)，idea(想法)，reason(理由)等。表语从句对主句主语进行说明、解释，使主语的内容具体化。 The trouble is (that) she has lost his money. 麻烦的事是他丢了钱。 The question is whether we need more ice cream.问题是我们是否还需要一些冰淇淋。
状语从句练习题含答案及解析
状语从句练习题含答案及解析 一、初中英语状语从句 1．—I hear Music and Art will enter the Entrance Examination for the high school. —Yes. but don’t worry. Nothing will be difficult if more attention _____ to them. A．will pay B．will be paid C．is paid D．pays 【答案】C 【解析】句意：——我听说音乐和艺术将进入高中入学考试。——是的。但别担心。如果对他们给予更多的关注，就不会有困难。考查被动语态。本句是if引导的条件状语从句，需用一般现在时态代替一般将来时态；从句主语more attention是单数第三人称，又是动词pay的受动者，需用被动语态，即is+paid结构；根据句意语境，可知选C。 2．You won't succeed _____ you work hard A．if B．because C．unless D．so that 【答案】C 【解析】 【详解】 句意：你不会成功的，除非你努力工作。if如果；because 因为，引导原因状语从句；unless如果不，除非；so that以至于，引导结果状语从句；为的是，引导目的状语从句。根据句意可知，这里表示“如果不努力工作”，故应选C。 3．一When did you leave your office yesterday? 一 I finished the project. A．Until B．While C．When D．Not until 【答案】D 【解析】 句意：昨天你什么时候离开你的办公室的？——直到我完成那个任务。本题考查连词。A. Until 直到···时候才结束，要与延续性动词连用；B. While 当···时候；C. When 当···时候；D. Not until直到···时候才开始，与非延续性动词连用；句子中finished（完成）是非延续性动词，故选D 4．It is necessary for children to exchange ideas with parents from time to time ________ a good parent-children relationship could be set up. A．so that B．because C．as soon as 【答案】A 【解析】 【详解】 句意“为了建立良好的亲子关系，孩子们有必要不时地与父母交流思想”。A.目的是，为的是（引导目的状语从句）；B.因为（引导原因状语从句）；C.一……就……（引导时间状语从句）。根据句意可知，表示“目的是为了建立良好的亲子关系”，表示目的，故选A。
表语从句讲解
一．定义： 表语从句就是用一个句子作为表语。位于系动词之后，说明主语身份，特征，属性或状态。比较： 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 二、系动词的分类（了解哪些词为系动词） 系动词有表示状态的；有表示状态变化的。 表示状态的有： 1）be, seem ,appear 等。 2）look ,sound ,feel ,taste ,smell 等，由感官动词变化而来。意思为“看（听、摸、尝、闻）起来”。 Mr. Li looks quite young. 李先生看起来很年轻。 3）stand ,keep ,prove ,remain 等由不及物动词转化而来。 The machine has been standing idle. 这台机器一直闲着不用。 2.表示状态变化的： become ,get ,grow, fall, turn等 He has fallen ill. 他已经病倒了。 三连接表语从句与主句的关系词主要有三类：
1. 从属连词：that（无有词义）, whether（是否,if （是否） 2. 关系代词：who（谁，主格）, whom（谁，宾格）,whose谁的，所有格）, what（什么）,which（哪个，哪些） 3. 关系副词：when（什么时候）where（什么地方）why（为什么）, how（怎样）例如： The fact is that we have lost the game. 事实是我们已经输了这场比赛。 That’s just what I want. 这正是我想要的。 This is where our problem lies. 这就是我们的问题所在。 That is why he didn’t come to the meeting.那就是他为什么不到会的原因。 It looks as if it is going to rain. 看上去天要下雨了。 It is because you eat too much那是因为你吃得太多了。 The reason why he was late was that he missed the train by one minute this morning （当主语是reason时，表语从句要用that引导而不是because） 另外，与其他名词从句有所不同的是as, as if/though, because也可用来引导表语从句.如： He looked just as he had looked ten years before.他看起来还与十年前一样。 She seems as if she had done a great thing.她看起来好像做了一件大事。 It is because you eat too much.那是因为你吃得太多了。 【注意】because可引导表语从句，但与之同义的since, as, for等也不用于引导表语从句。
状语从句练习题及答案详解
状语从句练习题 1. I had been looking for the book for two days __ I found it at last. a. until b. when c. before d. while 2. He punished his students ___ they did anything wrong. a. however b. whenever c. whatever d. whichever 3. Those passengers will wait here ___ the bus arrives. a. until b. because c. though d. as 4. Hardly had we reached home __ it began to rain. a. before b. than c. as soon as d. when 5. No sooner had we arrived at the cinema___ the film began. a. than b. before c. when d. as soon as 6. You can't watch TV __ you've finished your homework. a. since b. until c. as d. after 7. We had scarcely left our school ___ the rain began. a. before b. than c. while d. when 8. We have never seen her again ____ she went to work in another city. a. when b. as c. since d. while 9. __ the fight stopped, travel across the country has been quite safe. a. Since b. When c. After d. Unless 10. a. before b. when c. as d. than 1 / 13 They were just about to leave the telephone rang.