2021届高考英语一轮复习考点23条件让步和原因状语从句考点归纳 试卷

考点23 让步和原因状语从句
考向三、条件状语从句
1. if引导的条件状语从句
if可引导非真实条件状语从句(见＂虚拟语气＂)和真实条件状语从句。
If he said that, he can’t be telling the truth.
如果他说了那样的话，他不可能是说实话。
2. unless引导的条件状语从句
unless引导的是否定条件状语从句，在意义上相当于if...not，而且语气较强，一般不用于虚拟语气。
You’ll be late unless you hurry.
你会迟到的，如果不赶快的话。

1.（2019·江苏卷·单项填空）The doctor shares his phone number with the patients __________ they need medical assistance.
A. if only B. as if C. even though D. in case
【答案】D
【解析】考查状语从句的连词。句意：医生给了病人他的手机号码，以防病人需要医疗援助。A. if only要是……多好；B. as if好像，仿佛；C. even though即使，尽管；D. in case以备，以防，免得，引导条件状语从句。故选D。
2.（2019·天津卷·单项填空）Tom is so independent that he never asks his parents' opinion _________ he wants their support.
A. since B. once
C. unless D. after
【答案】C
【解析】考查连词辨析。句意：汤姆是如此独立，以至于他从来不征求父母的意见，除非他想得到他们的支持。since因为；once一旦；unless除非；after在……之后，根据题意，故选C。unless在此引导条件状语从句。
3.(2018·北京卷·单项填空) _________ we don’t stop climate change, many animals and plants in the world will be gone.
A. Although B. While C. If D. Until
【答案】C
【解析】考查状语从句。句意：如果我们不阻止气候变化，那么世界上的很多动植物将会消失。分析句意及句子结构可知，动植物不灭绝的前提条件是阻止气候变化。although尽管；while当……时候，尽管；if如果；until直到。根据句意可知选C。
4.________ we have enough evidence, we can't win the case.
A. Once B. As long as C. Unless D. Since
【答案】C　
【解析】考查连词。句意：如果我们没有足够的证据，我们就赢不了官司。后句说官司打不赢，用unless来表示相反的条件。
【名师点睛】条件状语从句就是在复合句中表示主句动作发生条件的状语从句。引导条件状语从句最经常用的连词是if，它的意思是＂如果＂； 也可以用unless引导：unless的意思是＂如果不＂＂除非＂，相当于if not。
3. only if引导的条件状语从句
only if在引导条件状语从句时意为＂只有……(才)；只有在……的时候，唯一的条件是……＂。
I’ll let you use the car only if you keep it in good condition.
只要你把车保养好，我就让你用。
4. as/so long as引导的条件状语从句
as/so long as意为＂只要；如果＂。
As long as it doesn’t rain, we can play.
只要不下雨我们就能玩。

You won’t find paper cutting difficult _____you keep practicing it.
A. even if B. as long as
C .as if D. ever since
【答案】B
【解析】句意：只要你不断练习，你不会觉得剪纸很难。A. even though即使，虽然;B. as long as只要；C. as if犹如，好像；D. ever since自从。结合句意，此处用as long as引导条件状语从句。故选B。
5. provided (that)/providing (that)引导的条件状语从句
provided (that)/providing (that)意为＂假如；如果＂。
I will agree to go provided / providing (that) my expense is paid.
假如为我负担费用，我就同意去。
Providing you promise not to tell anyone else I’ll explain the secret.
假如你承诺不告诉别人，我就告诉你这个秘密。
6. on condition that（条件是）和suppose / supposing (that)（假设；如果）也可引导条件状语从句
I can tell you the truth on condition that you promise to keep it a secret.
我可以告诉你真相，条件是你答应保守秘密。
Suppose/ Supposing (that) they refuse us, who else can we turn to for help?

在条件状语从句中，通常要用一般现在时表示将来意义，而不能直接使用将来时态。不过，有时表示条件的 if之后可能用 will，但那不是将来时态, 而是表示意愿或委婉的请求(will为情态动词)。
If you will sit down for a few moments, I’ll tell the manager you’re here. 请稍坐片刻，我这就通知经理说您来了。
考向四 让步状语从句
让步状语从句是状语从句中的一种。
一般翻译为＂尽管……即使……＂就是我们日常生活中用的＂退一步说……＂的感觉。
引导让步状语从句的连词主要有以下这些：though, although, as; even if, even though; whether...or...; no matter+疑问词，疑问词-ever。下面对这些连词引导的让步状语从句作一说明。
1. although/though引导的让步状语从句
although和though，都作＂虽然；尽管＂解，通常可以换用，although的语气较重。如果要强调＂但是＂语气，可使用yet，still或nevertheless来表示＂但是＂、＂依然＂或＂然而＂之意。
Although they have been talking for a long time, he cannot make her believe him.
虽然和她谈了半天，他还是不能让她信任自己。

We had to wait half an hour ________we had already booked a table.
　A. since B. although C. until D. before
【参考答案】B
【答案解析】句意：尽管我们已经预定了桌子，但还是等了半小时。分析句子结构可知，此处是让步状语从句，所给四个选项中只有although可以引导让步状语从句。故选B。
2. even if/even though引导的让步状语从句
（1）even if引导的让步状语从句
even if ＂即使，纵然＂，从句表示的是尚未发生的动作或存在的情况。
Even if it rains tomorrow, we won’t change our plan. 即使明天下雨，我们也决不改变计划。
Even if I failed again, I will not give up the experiment. 即使我再次失败，我也决不会放弃实验。
（2） even though引导的让步状语从句
even though＂虽然，尽管＂，从句所表示的是已经发生的动作或存在的情况，通常可以和although/though换用。
Even though I didn’t understand a word, I kept smiling. 即使我一个字也不懂，我还是保持微笑。
Even though you say so, I do not believe it. 即使你这样说，我也不信。

（2016·北京卷﹒单项填空）My grandfather still plays tennis now and then, _______________ he’s in his nineties.
A. as long as B. as if C. even though D. in case
【参考答案】C
【答案解析】考查状语从句。句意：即使九十多岁了，我的爷爷仍然时不时地打打网球。A.as long as只要，引导条件状语从句；B.as if似乎，引导方式状语从句或表语从句；C. even though即使，引导让步状语从句；D.in case以防，引导目的状语从句。这里是转折关系，故选C。
3. as引导的让步状语从句
as引导让步状语从句时，意为＂尽管，虽然＂，从句多位于主句之前，而且必须使用倒装语序。通常如果从句中有形容词或名词作表语，则把表语置于句首，而且名词前要省略冠词；如果从句中有修饰动词的副词，则将该副词置于句首；如果从句中有情态动词，则将情态动词后的动词原形置于句首。此用法与though的倒装完全一致。(although无此用法)
Much as I admire his courage, I don’t think he acted wisely. 我虽然佩服他的勇气，但我认为他这样做是不聪明的。
Strong as you maybe, you cannot lift it. 虽然你可能很有力气，你却无法把它提起来。
Child as he is, he is very brave.尽管他还是个孩子，但是他很勇敢。

1._________， his idea was accepted by all the people at the meeting.
　A. Strange as might it sound
　B. As it might sound strange
　C. As strange it might sound
　D. Strange as it might sound
2._________， Carolina couldn’t get the door open.
　A. Try as she might B. As she might try
　C. She might as try D. Might she as try
【参考答案】1.D 2.A
【答案解析】分析句子结构可知，以上两题都是有as引导的让步状语从句，因此要要倒装语序。
4. while引导的让步状语从句
while＂虽然，尽管＂，多用于正式文体，且多位于句首，相当于although。
While I understand your point of view, I do not share it. 我虽了解你的观点，但不敢苟同。
While I sympathize, I really can’t do very much to help. 虽然我很同情，但我确实帮不了什么忙。

（2016·浙江卷﹒单项填空）_____________ online shopping has changed our life, not all of its effects have been positive.
A. Since B. After C. While D. Unless
【参考答案】C
【答案解析】句意：尽管网上购物已经改变了我们的生活，但不是所有的影响都是积极的。while引导让步状语从句，意为＂尽管，虽然＂；since既然，自从；after在……之后；unless除非。故选C。
5. 疑问词-ever与no matter+疑问词引导的让步状语从句
（1）whatever/no matter what引导的让步状语从句
whatever和no matter what用法相同，都作＂无论什么＂解，后者多用于非正式文体。
Whatever/No matter what he says, don’t go. 不管他说什么，你都不要走。
We are determined to fulfill the task, whatever/no matter what happens. 不管发生什么，我们决心完成这项任务。
（2） whichever/no matter which引导的让步状语从句
whichever和no matter which用法相同，都作＂无论哪个＂解，后者多用于非正式文体。
Whichever/No matter which you buy, there is a six-month guarantee. 不论你买哪个，都有六个月的保修期。
Whichever/No matter which of the two men had stolen her purse, Barbara was determined to find them. 不管是这两个人中的谁偷了她的钱包，芭芭拉都决心找到他们。
（3）whoever/no matter who引导的让步状语从句
whoever和no matter who用法相同，都作＂无论谁＂解，后者多用于非正式文体。
You can’t come in, whoever you are. 不管你是谁，都不能进来。
Whoever/No matter who wants to speak to me on the phone, tell him I’m busy. 不管谁要我接电话，就说我现在正忙着呢。
（4） wherever/no matter where引导的让步状语从句
wherever和no matter where用法相同，都作＂无论在（或到）哪里＂解，后者多用于非正式文体。
Wherever/No matter where you go, I’m right here waiting for you. 无论你到哪里，我都依然在这里等着你。
（5）however/no matter how引导的让步状语从句
however和no matter how用法相同，都作＂无论如何……＂解，后者多用于非正式文体。
However much you regret doing that, there is nothing you can do about it now. 无论你可能多么懊悔你曾经做过的事，现在也无济于事了。
However high it may be, it can’t reach the sky. 它不论有多高，也高不到天上去。
（6） whenever/no matter when引导的让步状语从句
whenever和no matter when用法相同，都作＂无论何时＂解，后者多用于非正式文体。
Whenever I’m unhappy, he cheers me up. 不管什么时候我不高兴，他都给我鼓劲儿。

1._________， I have to put it away and focus my attention on study this week.
　A. However the story is amusing
　B. No matter amusing the story is
　C. However amusing the story is
　D. No matter how the story is amusing
【参考答案】C
【答案解析】句意：无论故事多么有趣，这个星期我都得把它放起来而专注学习。分析句子结构及选项可知，此处应是however引导的让步状语从句。选项中no matter how所引导的状语从句语序不正确。故选C。
2. You should try to get a good night’s sleep ________much work you have to do.
　A. however B. no matter
　C. although D. whatever
【参考答案】A
【答案解析】句意：无论有多么多的工作要做，你都应该晚上睡好。分析句子结构可知，＂________much work you have to do＂是让步状语从句，此处表示＂多么＂，且修饰形容词much应用however。故选A。
6. (no matter) whether...or引导的让步状语从句
由这一个复合连词引导的让步状语从句旨在说明正反两个方面的可能性都不会影响主句的意向或结果。如：
You'll have to attend the ceremony whether you're free or busy. 不管你忙不忙，都要参加这个典礼。
Whether you believe it or not, it's true.无论你是否相信，这都是真的。

— Dad, I’ve finished my assignment.
— Good, and ________you play or watch TV, you mustn’t disturb me.
　A. whenever B. whether
　C. whatever D. no matter
【参考答案】B
【答案解析】句意：——爸爸，我的作业完成了。——好，无论你玩耍还是看电视，都不能打扰我。根据语境可知，此处是whether…or…引导的让步状语从句。故选B。

考向五、原因状语从句
原因状语从句是表示原因或理由的，引导这类从句的最常用的连词是because, since, as , now that（既然）等，for 表示因果关系时（它引导的不是从句）为并列连词，语气不如because强。
1. because引导的原因状语从句
because表示人们不知道的直接的原因或理由，着重点在从句，其所引导的从句，为全句句意的中心所在。通常用于回答why引出的疑问句，语气最强，除特别强调外，该从句一般位于主句后面。
I didn’t go abroad with her because I couldn’t afford it.
我没有和她一起出国是因为费用太高。
Don’t scamp your work because you are pressed for time.
不要因为时间仓促而马马虎虎。

I wonder whether his hearing is okay _______________ he has turned the television up very loud.
A. unless B. although
C. until D. because
【答案】 D
【解析】句意：我想知道他的听力是否还好，因为他把电视的声音开得很大。A. unless除非；B. although虽然；C. until直到；D. because因为。结合句意可知选D。
2. as引导的原因状语从句
as引导的原因状语从句所引出的理由在说话人开来已经很明显，或已为听话人所熟悉而不需要强调，从句多位于主句之前，通常可以和since换用，as语气稍弱。
As I didn’t know the way，I asked a policeman. 我不认识路，因而问警察。
As it is snowing, we shall not climb the mountain. 由于在下雪，我们不去爬山了。
1.___________ you weren’t there, I left a message.
A.As B.When C.Though D.For
【答案】 A
【解析】句意：因为你不在那儿，所以我给你留言了。此处应用as引导原因状语从句，故选A。when引导时间状语从句；though引导让步状语从句；for用作并列连词表原因时不能位于句首。
2. When my father goes somewhere, he always goes along with my mother, _____________ he doesn’t like going alone.
A.though B.as C.while D.even if
【答案】B
【解析】句意：我爸爸去一些地方时总是和我妈妈一起，因为他不喜欢一个人去。此处用as引导原因状语从句。though＂尽管＂；while＂当……时＂；even if＂尽管＂。
3. since引导的原因状语从句
since表示人们已知的事实，不许强调的原因，故常译为“既然……”，通常位于主句前。since从句是次要的，重点强调主句的内容，相当于now that。
Since traveling by air is much faster, they decided to take a plane.
既然乘飞机旅行快得多，他们就决定坐飞机。
Since you won’t help me，I’ll ask someone else.你既然不帮我，那我就请别人帮忙。

Mark needs to learn Chinese ________his company is opening a branch in Beijing.
A. unless B. until C. although D. since
【答案】D　
【解析】考查状语从句的连接词。his company is opening a branch in Beijing是学习汉语的原因。unless除非；until直到……为止；although尽管；since由于，自从。在句中since是“由于”的意思。句意：马克需要学习汉语，因为他的公司要在北京开分公司。
4. now(that)引导的原因状语从句
now(that)“因为；既然”，通常可以和since换用。其中that可省去，用来表示一种新的情况，再加以推论。
Now(that) you’ve passed your test you can drive on your own.你既已考试合格，就可以独自开车了。
I do remember，now (that) you mention it. 你这一提，我倒的确想起来了。

________the term has come to an end, I am going to take a trip for relaxation.
A. Now that      B. Even if
C.As though     D. So that
【答案】A
【解析】句意：既然这个学期已经结束了，我打算去旅行放松一下。now that既然，引导原因状语从句，符合句意。
5. seeing (that)引导的原因状语从句
seeing (that)“鉴于；由于”，通常用于非正式文体。
Seeing (that) the weather is bad，we’ll stay at home.天气不好，我们还是呆在家里吧。
6. in that引导的原因状语从句
in that“因为；基于……的理由”，可以和because换用，多用于正式文体，它所引导的原因状语从句总是位于主句之后。
Advertisement is distinguished from other forms of communication in that the advertiser pays for the message to be delivered. 广告不同于其他交际形式，因为登广告的人要为其所提供的信息付费。
I’m in a slightly awkward position, in that he’s not arriving until 10th.
我的处境有点难堪，因为他要十号才来。

The Chinese language ________Western languages ________, instead of an alphabet, it uses characters which stand for ideas, objects or ideas.
A. differs from; in which   B. is different from; in that
C. differs from; in what     D. is different from; in where
【答案】B
【解析】考查动词短语和连词。表示“与……不同”可以用differ from…或be different from…；in that是固定连词，引导原因状语从句，表示“由于，因为”，故选B项。


题组一 基础过关
单句改错
下列各句均有一-处错误， 请标出并改正。
1. Take a taxi in case you will be late for the meeting.
2. The young soldier was taken to the hospital because of he had been wounded seriously on the battle-field.
3. Since that everybody is here, let’s start our class.
4. It is a long time after I saw you last time.
5. The light went out while we are having supper.
6. Still not a top student although I am now, I have found myself filled with great confidence to face any difficulty and challenge.
7. I believe you will have a wonderful time here if you got to know everyone else.
8. We need to get to the root of the problem after we can solve it.
9. Today, we will begin we stopped yesterday so that no point will be left out.
10. My parents don’t mind what job l do as far as l am happy.
题组二 能力提升
1．（2020·全国高三）He smiled politely Mary apologized for her drunken friends.
A．as B．if
C．unless D．though
2．（2020·全国高三）You can phone your friend at work _____ you don’t make a habit of it.
A．as if B．even though C．as long as D．in case
3．（2020·全国高三）Some pressure is good for you ________ it can help you try harder.
A．unless B．although
C．before D．as
4．（2020·全国高三）________ birds use their feathers for flight, some of their feathers are for other purposes.
A．Once B．If C．Although D．Because
5．（2020·全国高三）—Have you got the results of the final exam?
—Not yet. I'm afraid it will be a few days we know the final results.
A．before B．after C．until D．when
6．（2020·全国高三）________ the sales figure of the new range of products is relatively small, the potential market is large.
A．Unless B．After C．Since D．While
7．（2020·全国高三）— Why didn’t you try to finish the composition?
— I tried to, but ________ I could, the bell ran announcing the end of the examination.
A．until B．when
C．after D．before
8．（2020·全国高三）Tom is so independent that he never asks his parents’ opinion ________ he wants their support.
A．since B．once
C．unless D．after
9．（2020·江苏高一期中）So long as you do what you can, no one will blame you ____________ you might fail in the future.
A．as though B．in case
C．now that D．even if
10．（2020·七台河市第一中学高一期末）Located ________ the Belt meets the Road, Jiangsu will contribute more to the Belt and Road construction.
A．why B．when
C．which D．where
11．（2020·七台河市第一中学高二期末）Incredible ________ it was, it was true.
A．although B．though C．even though D．despite
12．（2020·七台河市第一中学高二期末）_________ my heart still beats, I will go on working for the people.
A．As soon as B．As far as C．As long as D．As much as
13．（2020·乌鲁木齐市第四中学高一期末）— When did you go to bed last night?
— I didn’t go to bed my father got home.
A．while B．after C．when D．until
14．（2020·黑龙江哈尔滨三中高二期末）He felt a sense of relief _______ he got his medical examination report.
A．as long as B．so that C．the moment D．as if
【答案】C
15．（2020·黑龙江牡丹江一中高二期末）__________, he is famous for writing blogs.
A．As he is a teacher B．A teacher as he is
C．Teacher although he is D．Teacher as he is
16．（2020·黑龙江牡丹江一中高二期末）He was deeply struck by the natural beauty of the West Lake___________he went to Hangzhou.
A．at the first time B．the first time C．for the first time D．at the first time when
17．（2020·北京高一期中）_________I saw him, I knew he was the man the police were looking for.
A．The place B．The week C．The day D．The instant
18．（2020·北京高一期中）In boxing, players should wear gloves and mouth guards ________ anything dangerous happens.
A．in vain B．in a word C．in debt D．in case
19．（2020·江苏高二期末）_____ never easy, innovation is absolutely possible with adequate training and continuous practice.
A．When B．As C．Since D．While
20．（2018·湖南高二期末）______ excuse you have, you should apologize for not having finished the task in time.
A．Wherever B．Whatever C．Whenever D．However
21．（2018·湖南高一期末）______the phone call, the construction site is crowded with workers full of joy and excitement.
A．On receiving B．As soon as receiving C．The Moment he received D．Receiving
22．（2020·黑龙江牡丹江一中高二月考）____, Mary couldn’t get the door open.
A．Try as she might B．As she might try C．She might as try D．Might she as try
23．（2020·黑龙江实验中学高二期中）_____ she was sick, I was expected to take his place greatly surprised me, for I didn’t have much work experience.
A．That if B．That C．If that D．If
24．（2020·黑龙江实验中学高二期中）Tom was so angry____ he heard his friend betrayed him____ he tore the letter into two immediately.
A．that; when B．that; that C．when; what D．when; that
25．（2020·黑龙江实验中学高二期中）Many adults agree that teenagers shouldn't live alone they have their parents’ permission.
A．if B．unless C．in case D．now that
26．（2020·黑龙江实验中学高二期中）______would like to devote his whole life to his country should go______there are all kinds of difficulties.
A．Who;some B．Whoever;where
C．Whatever; anywhere D．Who;there
27．（2020·天津一中高三月考）Peter had been puzzled over the problem for over an hour___________ all at once the solution flashed across his mind.
A．when B．while C．then D．as
【
28.（2020·天津高三一模）_________we relieve pressure in a proper way, we can relax ourselves and keep away from its bad effects.
A．So that B．As long as C．Even if D．As though
29．（2020·江苏高三三模）______ most of us are satisfied with the nutrients we’re getting from our diets, they are actually far from enough.
A．While B．If C．Since D．Before
30．（2020·天津高三一模）My friend walked me to the bus stop and waited with me______________ the bus arrived.
A．once B．unless C．when D．until
题组三 体验真题
1．（2020·天津高考真题）__________ he could give her sympathy, any practical help was almost beyond him.
A．If B．Since C．Although D．Until

题组一 基础过关
单句改错
1. will be-tare句意:打的去吧，以防你开会迟到。in case作连词.意思是“以防;万一”引导状语从句、从句的谓语用一般现在时表示将要发生的情况。
2.去掉of句意:年轻的士兵被送去医院,因为他在战场上伤得很严重。Because of后接名词或动名词词短语，because后接句子引导原因状语从句。
3.去掉that句意: 既然人来齐了，我们开始上课。根据句意since引导原因状语从句，that多余故删除。
4. after --since句意:我好久没见到你了。这里since引导时间状语从句。
5. are- -were句意: 我们正在吃晚餐,灯突然灭了。根据句意从句谓语也应使用过去时,故将are改为were.
6. although-as/ though句意: 虽然我现在仍然不是一个尖子生,但是我发现自己充满了巨大的信心来面对任何困难和挑战。根据句子倒装结构可知，此处是让步状语从句的倒装,需用as/ though来引导。
7. got-get句意: 我相信一旦你在这认识了别人之后，你会在这儿有一段美好的时光。考查条件状语从句的时态问题。根据前面的一般将来时，这里应该用一般现在时。
8. after - before句意: 我们需要找到问题的根源后才能解决它。考查时间状语从句。根据逻辑关系可知，“找到问题的根源"在“解决问题”之前发生。
9 begin后加where句意:今天,为了不遗漏要点，我们从昨天结束的地方开始。此处为where引导的地点状语从句。
10. far--long句意:我的父 母不介意我做什么工作，只要我开心。此处为as long as引导的条件状语从句，表示“只要……”。
题组二 能力提升
1．【答案】A
【解析】考查状语从句。句意为：当玛丽因她醉酒的朋友向他道歉时，他礼貌地微笑着。A. as当…...时候; B. if如果;C. unless除非；D. though虽然。as可引导时间状语从句，表示主从句动作同时发生或前后紧接着发生，常常译为“(正当)……的时候，随着……，一边……一边……”，故只有as符合题意。故选A项。
2．【答案】C
【解析】考查状语从句。句意：你可以工作时给朋友打电话，只要你不把这个养成习惯就可以。 A. as if好像；B. even though尽管；C. as long as只要；D. in case以防。前后是条件关系，表示“只要”，故选C项。
3．【答案】D
【解析】考查状语从句。句意：一些压力对你来说是好的，因为它能帮助你更加努力地尝试。as引导原因状语从句，表示“因为”，故选D。
4．【答案】C
【解析】考查状语从句。句意：尽管鸟儿们用羽毛来飞翔，但是他们的一些羽毛还有其他用途。A. Once 一旦；B. If如果；C. Although 尽管；D. Because因为。根据语境可知，前后之间是让步关系，故选C。
5．【答案】A
【解析】考查连词辨析。句意：——你知道期末考试的结果了吗？——还不知道呢，恐怕再过一些天我们才知道最终的结果。A. before ……才……；B. after……之后；C. until直到；D. when当什么时候。句型It will be + 时间段 + before …表示“要等多长时间才……”。这里指要等几天才能知道期末考试的结果。故选A。
6．【答案】D
【解析】考查让步状语从句。句意：尽管新系列产品的销售数字相对较小，但潜在市场很大。A. Unless除非；B. After在……之后；C. Since自从，既然；D. While虽然。根据句意可知，此处是让步状语从句，
while用在句首，引导让步状语从句。故选D。
7．【答案】D
【解析】考查连词辨析。句意：——你为什么不试着把作文写完？——我尽力了，但是在我写完之前宣布考试结束的铃声就响了。A. until直到；B. when当……的时候；C. after在……之后；D. before在……之前。根据but可知，他没有写完作文，所以是在写完之前铃声响了，故选D项。
8．【答案】C
【解析】考查连词辨析。句意：汤姆是如此独立，以至于他从来不征求父母的意见，除非他想得到他们的支持。A. since既然；B. once一旦；C. unless除非；D. after在……之后。故选C符合语境。
9．【答案】D考查让步状语从句。句意：只要你尽力而为，即使将来可能失败也不会有人指责你。A. as though仿佛；B. in case万一；C. now that既然；D. even if即使。前后是让步关系，此处应用even if引导让步状语从句。
10．【答案】D
【解析】考查状语从句。句意：位于丝绸之路交汇处的江苏省将会对“一带一路”的建设做出更大的贡献。be located in+地点名词表示“位于/坐落某地”，where引导的地点状语从句在此相当于in some place，故选D。
11．【答案】B
【解析】考查让步状语从句。句意：虽然它难以置信，但它却是真的。四个选项都有“尽管”的意思，但是A. although和C. even though引导让步状语从句，不能使用倒装结构；D. despite是介词，不能引导从句； B. though引导让步状语从句，可以使用倒装结构。此处是倒装结构，将表语提前了。故选B。
12．【答案】C
【解析】考查条件状语从句。句意：只要我的心脏还在跳动，我就要为人民工作。A. As soon as一……就……；B. As far as就……而言；C. As long as只要；D. As much as多达，与……一样多。根据I will go on working for the people可知，此处表示“只要”，用as long as引导条件状语从句。故选C项。
13．【答案】D
【解析】考查连接词辨析。句意：——昨晚你什么时候睡觉的？——直到我爸爸回到家我才睡觉。A. while在……期间；B. after在……以后；C. when当……时候；D. until到……为止。分析句子可知，空白处意为“才……”；not…until意为“直到……才……”，是固定搭配，因此填until符合语境。故选D。
14．【答案】C
【解析】考查连词。句意：一拿到自己的体检报告他就松了口气。A. as long as只要；B. so that以便，因此；C. the moment一……就……；D. as if好像。根据句意可知，此处用“一……就……”引导时间状语从句符合语境，故选C项。
15．【答案】D
【解析】考查状语从句的倒装。句意：尽管是一个老师，但他因为写博客而出名。分析句子可知，此处考查as/though引导让步状语从句时要进行部分倒装（though引导时可以不倒装），其格式为adj/adv./n./v + as/though + 主语 + 其它，且名词提前时要省略冠词，而although引导让步状语从句不能倒装，故选D项。
16．【答案】B
【解析】考查连词。句意：他第一次去杭州时就被西湖的自然美景深深地吸引了。A. at the first time第一次；B. the first time第一次……时；C. for the first time第一次；D. at the first time when(无此表达)。分析句子可知，此处需要连词连接两个句子，再结合语境可知，此处用“第一次……时”符合语境，引导时间状语从句。故选B项。
17．【答案】D
【解析】考查时间状语从句。句意：一看见他，我就知道他是那个警察正在寻找的人。分析句子，I saw him 与I knew he was the man..为两个完整的句子，此处需用连词连接。The instant 译为 “一……就”时，引导时间状语从句符合句意。故选D项。
18．【答案】D
【解析】考查目的状语从句。句意：在拳击运动中，运动员应该戴手套和牙托，以防任何危险的事情发生。A. in vain徒劳；B. in a word总之；C. in debt负债；D. in case以防，以免。分析句子可知，戴手套和牙托是为了“防止”发生危险，所以用in case引导目的状语从句。故选D项。
19．【答案】D
【解析】考查让步状语从句。句意：尽管创新绝非易事，但只要经过充足的训练和持续的实践，创新是绝对可能的。A. When当……的时候；B. As由于；C. Since既然；D. while虽然。根据“innovation is absolutely possible with adequate training and continuous practice.”可知此处表示“尽管创新绝非易事”，注意：虽然as也有“尽管”之意，但其引导的让步状语从句常用于倒装结构，故D项正确。
20．【答案】B
【解析】考查状语从句。句意：无论你有什么借口，你都应该为没有及时完成任务而道歉。状语从句中表示“无论什么”，用whatever表示，wherever无论哪里；whenever无论什么时候；however无论如何。故选B。
21．【解析】考查时间状语从句。句意：他一接到电话，工地上就挤满了工人，充满了喜悦和兴奋。此处是the moment引导的时间状语从句，意思为“一……就”; “on+doing”也可以表示“一……就”,但doing的逻辑主语是he,和主句的主语the construction site不一致; as soon as后应接从句。故选C项。
22．【答案】A
【解析】考查让步状语从句和倒装。句意：尽管努力试过了，但Mary还是没法把门打开。从句意中可以梳理出让步状语从句的逻辑关系，根据选项这里用as来引导，其含义相当于though，而as引导的让步状语从句必须以部分倒装的形式出现，被倒装的部分可以是表语、状语或动词原形，即正常语序应当是As(Though) she might try，部分倒装则将try提至句首。故选A项。
23．【答案】A
【解析】考查主语从句和状语从句。句意：如果她生病，大家希望我来代替她工作，这令我非常吃惊，因为我根本就没有什么工作经验。首先断开句子she was sick, I was expected to take his place这两个部分只有都逗号无连词连接，根据句意，前一部分应为条件状语从句，即if she was sick…；_____ she was sick, I was expected to take his place greatly为主语从句，且从句中不缺任何成分时应当用that引导，且that不能省略。故选A。
24．【答案】D
【解析】考查结果状语和时间状语从句。句意：“当汤姆听说他的朋友背叛他时，他是如此的生气，以至于他立刻将来信撕成了两半。”此句应分为两部分来看.第一部分是so...that...句型,他生气的结果是撕了信，所以that应该在后半部分。再分析前半部分，可知此处是when引导的时间状语从句，表示当他得知他的朋友背叛他时，所以A正确。
25．【答案】B
【解析】考查状语从句。句意：许多成年人同意，青少年不应该独自生活，除非他们有父母的允许。A. if如果；B. unless除非；C. in case 万一；D. now that由于。此处为条件状语从句，即“在父母允许的条件下”，表示“除非”应用unless。故选B。
26．【答案】B
【解析】考查连接词。句意：无论谁想把一生奉献给国家，就应该到有各种困难的地方去。第一空为主语从句，从句中缺少主语，表示“无论谁”应用whoever引导，当用于状语从句时可以相当于no matter who；第二空为地点状语从句，表示“……的地方”应用where引导。故选B。
27．【答案】A
【解析】考查状语从句连词。句意：Peter已经被这个问题困扰一个多小时了，突然解决方法从他脑海里闪过。A. when当……时候；B. while当……时候，尽管，然而；C. then然后；D. as当，因为，尽管。分析句子可知，此处考查固定句型had done…when…“已经/刚做完某事……（突然）就……”，故选A项。
28.【答案】B
【解析】考查连词词义辨析。句意：只要我们用适当的方法缓解压力，我们就可以让自己放松，并且远离它带来的不好影响。A. So that因此；B. As long as只要；C. Even if尽管，即使；D.As though好像。根据后句“we can relax ourselves and keep away from its bad effects.”可知，此处用as long as“只要”，引导条件状语从句。故选B项
29．【答案】A
【解析】考查状语从句的连词。句意：尽管我们大多数人都满足于从饮食中获得的营养，他们事实上远远不够。A.while尽管；B.if引导条件状语，C.since可引导时间状语和原因状语，D.before引导时间状语。分析句意可知此处为让步关系。所以while合适，while可以引导让步状语从句，表虽然，尽管。所以答案应选A。
30．【答案】D
【解析】考查时间状语从句。句意：我的朋友陪我一起走到车站，和我一起等到公交车到了才走。A. once一旦；B. unless除非；C. when当……的时候；D. until直到。根据空前waited with me可知，此处指“一直等到公交车到了才走”。故选D。
题组三 体验真题
1．【答案】C
【解析】考查状语从句。句意：虽然他能给她同情，但是他几乎无法提供任何实际的帮助。前后文是转折关系，故用although引导的让步状语从句，if引导条件状语从句；since引导时间状语从句和原因状语从句；until引导时间状语从句。故选C。