专题复习19状语从句学案
【学习目标】
掌握时间状语从句、原因状语从句、条件状语从句、比较状语从句、目的状语从句、结果状语从句和让步状语从句的用法。
【重点难点】
主句与从句时态一致的问题。
【知识铺垫】
状语从句的语序应是主语+谓语+其他成分,即陈述句的语序。
状语从句的位置,可以放在主句前面或后面,但是若放在主句前面,要用逗号与主句分开；主句若是疑问句,那么时间状语从句只能放在主句的前面。
【课堂探究】
探究1 时间状语从句 在时间状语从句中,通常要用动词的一般现在时态表示将来时,用一般过去时表示过去将来式。时间状语从句由when, while, after, before, since, as soon as, till, until等连词引导。21教育网
【针对练习】—Mum, ____shall we have lunch?
—We will have it when your dad______.
A. when；returns B. where returns C. where；will return D. when；will return
探究2原因状语从句 原因状语从句由because, as, since等连词引导。
【针对练习】I can’t understand this passage _____ there are no new words in it.
A. if?????????????? B. because???????????? C. though?????????????????D. and
探究3条件状语从句 条件状语从句通常由if, unless引导。
【针对练习】1. ____you go to bed earlier, you won’t feel tired in the mornings.
A. Unless B. Because C. If D. When
2. You won’t pass your exams ___________ you work harder.
A. when B. if C. unless D. after
探究4 让步状语从句 让步状语从句通常由although, though等连词引导。
【针对练习】—Shall we go on working? —Yes, I prefer to have a rest. www.21-cn-jy.com
A. when B. if C. because D. though
探究5 目的状语从句 目的状语从句通常由 so that, in order that引导。
【针对练习】—More and more people in Beijing are learning English _______they can better serve the 2008 Olympic Games.
—I’m sure they will.
A. because of B. so that C. even though D. as if
探究6 结果状语从句 结果状语从句由so…that, such…that, so that引导。
【针对练习】The camera is expensive I can’t afford it.
A. so; that B. such; that C. so; as to D. enough; that
探究7比较状语从句 比较状语从句由as…as, 比较级 + than等连词引导。
【针对练习】Lucy looks stronger Lily.
A. than B. as C. then D. not as
【达标练习】单项选择。
1. I was drawing a horse ________the teacher came in. 21cnjy.com
A. while?? B. as?? C. when?? D. the moment
2. Some passengers were walking through one of the big halls at Paris’ Charles De Gaulle Airport the whole roof (屋顶) fell down.
A. while B. as soon as C. when D. after
3. You will stay healthy ___ you do more exercise, such as running and walking.
A. if B. how C. before D. where
4. —Shall we go on working? —Yes, _________ I prefer to have a rest.
A. when B. if C. because D. though
5. None of us knew what had happened _________ they told us about it.
A. when B. until C. after D. though
6. —I hope you’ll enjoy your trip, dear!
—Thank you, mum. I’ll give you a call _________ I get there.
A. until B. as soon as C. since D. till
7. The camera is expensive I can’t afford it.
A. so, that B. such, that C. so, as to D. enough, that
8. I never seem to lose any weight, hard I try.
A. even though B. no matter how C. as if D. ever since
9. —Shall we go on working? —Yes, I prefer to have a rest.
A. when B. if C. because D. though
10. Edison never gave up, he failed many times.
A. and B. though C. or
11. The policeman asked the child cross the street the traffic lights turned green. 21世纪教育网版权所有
A. not; when B. don’t; before C. not to; until
12. —It’s time to go to bed, Li Ming.
—Mum, I have a lot of homework to do, I won’t go to bed I finish it
A .after B. until C. as soon as D. since21·cn·jy·com
13.You should make a good plan ______ you do anything important.
A. before????????? B. after??????????? C. though??????? D. until?
14. ________ they are brothers, they don’t look like each other at all.
A. Because B. Though C. When D. As
15. I enjoy learning English, ______ it takes me a lot of time.
A. as if B. though C. because D. for
【学后反思】
__________________________________________________________________________________________________________________________________
参考答案：1－5 CCADB 6－10 BABDB 11－15 CBABB
专题复习19状语从句当堂达标题
I. 根据所给汉语，完成英语句子。
1．直到爸爸回来，他才去睡觉。
He did ________ go to bed ________ his father ________ ________．
2．我每天都会去散步，除非遇上坏天气。
________ the weather stops me, I ________ ________ ________ ________ every day.21·cn·jy·com
3．只要我们竭尽全力，父母就会对我们的表现满意。
Our parents will be pleased with our performance ________ ________ ________we try our best.www.21-cn-jy.com
4．你一到上海就给我打电话好吗？
Will you please call me________ ________ ________ you get to Shanghai?
5．他每天早上起得很早以便能赶上公交车。
He gets up early every morning ________ ________ he can ________
________ ________．
6．虽然她很忙，但仍坚持自学英语。
________ ________ ________ ________， she kept on learning English by herself.21教育网
7．他长大后想当一名记者。
He wants to be a journalist________ ________ ________ ________．
8．既然每个人都在这儿，我们就开始开会吧。
________ everyone is here, let's begin our meeting.21cnjy.com
9．因为下大雨，所以她上学迟到了。
She was late for school________ ________ the heavy rain.
10．李明昨天没有来上学，因为他病了。
Li Ming didn't come to school yesterday________ ________ ________ ________.2·1·c·n·j·y
II. 单项选择。
( )1. If we ______ take environmental problems seriously, the earth _______ worse and worse.【来源：21·世纪·教育·网】
A. don’t; will be B. won’t; isn’t
C. won’t; is D. don’t; won’t be
( )2. If I make a lot of money I ___ give some to medical research or charities.
A. am going to B. can C. will D. should
( )3. Eating and drinking on Beijing subway is not allowed. If you ______ the rule, you’ll face a fine (罚款) of up to 500 yuan.
A. broke B. break C. will break D. have broken
( )4. —I want to know if Maria ______ us in the fashion show tonight.
—I believe if she ______ her homework, she will join us.
A. joins; finishes B. will join; finishes
C. joins; will finish D. will join; will join
( )5. —Alan! Why are you so late?
—Sorry! When I _______ home, I met one of my old friends.
A. went B. am walking
C. has gone D. was walking
( )6. I was drawing a horse ________the teacher came in.
A. while?? B. as?? C. when?? D. the moment
( )7. Some passengers were walking through one of the big halls at Paris’ Charles De Gaulle Airport the whole roof (屋顶) fell down.
A. while B. as soon as C. when D. after
( )8. You will stay healthy _______ you do more exercise, such as running and walking. 21世纪教育网版权所有
A. if B. how C. before D. where
( )9. —Shall we go on working?
—Yes, _________ I prefer to have a rest.
A. when B. if C. because D. though
( )10. None of us knew what had happened _________ they told us about it.
A. when B. until C. after D. though
( )11. —I hope you’ll enjoy your trip, dear!
—Thank you, mum. I’ll give you a call _________ I get there.
A. until B. as soon as C. since D. till
( )12. The camera is expensive I can’t afford it.
A. so, that B. such, that C. so, as to D. enough, that
( )13. I never seem to lose any weight, hard I try.
A. even though B. no matter how C. as if D. ever since
( )14. —Shall we go on working?
—Yes, I prefer to have a rest.
A. when B. if C. because D. though
( )15. I enjoy learning English, ______ it takes me a lot of time.
A. as if B. though C. because D. for
参考答案：
I. 1. not, until; came back /got home 2. Unless; go for a walk 3. as long as
4. as soon as 5. so that; catch the bus 6. Though / Although she was busy
7. When she grows up 8. Since 9. because of 10. because he was ill
II. 1—5 ACBBD 6－10 CCADB 11－15 BABDB
专题复习19状语从句教案
【教学目标】
让学生掌握时间状语从句、原因状语从句、条件状语从句、比较状语从句、目的状语从句、结果状语从句和让步状语从句的用法。21·cn·jy·com
【重点难点】
主句与从句时态一致的问题。
【知识梳理】
用一个句子(从句)来作另一个句子(主句)的状语，用作状语的句子就叫作状语从句。作什么样的状语就叫什么类型的状语从句。例如：条件状语从句就是用一个句子来作条件状语。21cnjy.com
状语从句的语序应是主语+谓语+其他成分,即陈述句的语序。
状语从句的位置,可以放在主句前面或后面,但是若放在主句前面,要用逗号与主句分开；主句若是疑问句,那么时间状语从句只能放在主句的前面。
一、时间状语从句
在时间状语从句中，通常要用动词的一般现在时态表示将来时，用一般过去时表示过去将来式。时间状语从句常用连词有： when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引导。【来源：21·世纪·教育·网】
1.考查when, while, as引导，表示“当……时候”。
(1) when 意为“当……时”，引导的时间状语从句表示主句的动作和从句的动作同时或先后发生。如：2-1-c-n-j-y
I feel very happy when you come to see me.你(们)来看我时，我感到很高兴。
When you are crossing the street, you must be careful. 你( 们)过街道时，一定要小心。21*cnjy*com
when 引导的时间状语从句中，可以用延续性动词，也可以用短暂性动词。如：
I will visit my good friend when I arrive.当我到达时，我将去看望我的好友。(短暂性动词)21*cnjy*com
Someone knocked at the door when I was sleeping. 当我正在睡觉时，有人敲门。(延续性动词)
注意：when 也可以作并列连词，表示一个动作正在进行的时候，突然间发生了另外一件事。如：
I was fishing by the river, when someone called for help.
我正在河边钓鱼，就在那时有人求救。
We were working in the chemistry lab, when the lights went out.
我们正在化学实验室工作，突然灯都熄灭了。
(2)while 意为“当……时”“在……期间”，引导的时间状语从句表示主从句的动作在同一时期发生，常用延续性动词或表示状态的词。如：
They rushed in while we were discussing problems.
当我们正在讨论问题时，他们冲了进来。
Father was cleaning the car while I was playing computer games.
当我正在玩电脑游戏时，爸爸正在清洗汽车。
注意：while 也可以作并列连词，表转折的关系，相当于but，译为“然而”。如：
I like listening to music, while my brother likes doing sports.
我喜欢听音乐，而我的兄弟爱好运动。
(3)as 意为“当……时”“一边……一边……”， 主从句动作同时发生。如：
As they walked, they talked happily.他们一边走，一边高兴地交谈着。
【考例】—Mum,____ shall we have lunch? —We will have it when your dad______. [连云港]21世纪教育网版权所有
A when；returns B where returns C．where；will return D．when；will return
[答案]A．[解析] 答语中when引导了一个时间状语从句，主句用了一般将来时态，所以从句用一般现在时态，可见正确答案在A与B之中。既然答语用了时间状语来回答，可见问句询问的也一定是时间，从而确定正确答案为A。
2. before 的用法
before的本意为“在……之前”，根据具体语境还可理解为“还没来得及/还没有……就……，趁着还没……就……，不知不觉就……，……才……”等。如：
We cleaned the classroom before we left school yesterday.
昨天离开学校之前，我们打扫了教室。
He had been a cook before he went to college.
他上大学前曾当过厨师。
【考例】Could you please give me your e-mail address ________you go? [昆明市]
A. as soon as B. before C. after D. until
[答案]B。[解析]这四个词(组)都可以引导时间状语从句，as soon as一……就……; before在……之前；after在……之后；until直到……才。分析句子可以看出句意为“在你走之前把你的电子邮件地址给我好吗?”【版权所有：21教育】
3．until和till的用法
与肯定式的主句连用，主句谓语必须是延续性动词，till/ until表示“……直到……”；与否定式的主句连用，且主句谓语是非延缓性动词时，till/ until表示“直到……才……”。其强调句型为“not…until” ，位于句首时要采用倒装形式。如：
【考例1】—Hurry up. The bus is coming．
—Oh, no. We mustn’t cross the street ____the traffic lights are green．[福州]
A．after B. since C. while D．until
[答案]D。[解析]本题应从句意人手。until常用于否定句中，构成“not…until”结构，意为“直到……才……”，该句意为“直到交通灯变绿，我们才能穿过马路”。
【考例2】The kids didn’t start to fly kites in the playground ___________the rain stopped.
A. if B. until C. whenever [成都]
[答案]B。[解析] not…until…直到……才。“直到雨停孩子们才可以去操场放风筝”。
【考例3】—Look! Here comes our school bus.
—No hurry. Don’t get on it _________it has stopped. [安徽]
A. until B. after C. since D. when
[答案]A。[解析]句中有don’t，可想not．．．until为固定结构，意为“直到……才……”。
二、条件状语从句
引导条件状语从句的从属连词有if ,unless(=if …not如果不……，除非)，as/so long as ,while(=as long as 只要)，supposing(that),provided/providing(that),in case(假使)，on condition that(在……的条件下)等。我们主要看一下由 if 引导的条件状语从句。if 意为“如果”，引导一般条件状语从句时，主句用将来时，从句用一般现在时。如：
If it doesn't rain tomorrow, we will go there by bike.
如果明天不下雨，我们就骑自行车去那里。
If I get there early, I can see the doctor quickly.如果我早早地到那里，我就可以快点看病。如：
【考例1】______you go to bed earlier, you won’t feel tired in the morning．[沈阳市]
A. Unless B. Because C. If D. When
[答案]C。[解析]考查if引导的条件状语从句。“假如你早一点上床睡觉，那么你在上午就不会感到累。”www.21-cn-jy.com
【考例2】You won’t pass your exams ___________ you work harder. [广东]
A. when B. if C. unless D. after
[答案]C。[解析]when，after一引导的是时间状语从句，不合题意；if，unless引导的是条件状语从句，If不合句意，“除非你更加努力地学习，否则，你不会通过考试”。故用unless。【出处：21教育名师】
三、原因状语从句
原因状语从句，常用的引导连词有 because (因为), as (由于)和 since (既然)。三者的区别是：在回答问题的时候，使用because；对于显而易见的原因，常用 as 或 since；as 和 since 的从句常放在主句之前，而 because 的从句常放在主句之后。如：
—Why did you go？你为何去？
—I went because Tom told me to go.那是因为汤姆叫我去。
As it was raining hard, we had to be indoors.
由于雨太大，我们只好待在家里。
Since you feel ill, you'd better not go to work.
既然你感觉不舒服，你最好不要去上班了。
【考例】 Mark isn't coming to the concert_____________ he has got too much work to do.21教育名师原创作品
A．so B．until C．although D．because
[答案]D。[解析]so“因此”；until“直到”；although“虽然”；because“因为”。“太多工作要做”是“没有来音乐会”的原因。21·世纪*教育网
四、结果状语从句
常由“so...that...” “such...that...”(如此……以致……)引导。如：
He is so short that he can't reach the apple.他太矮了，够不到那个苹果。
It is such a heavy box that I can't move it.这是个很重的箱子，我搬不动它。
【考例】The camera is expensive I can’t afford it. (本溪)
A. so, that B. such, that C. so, as to D. enough, that
[答案]A。[解析]依据题意：这照相机太贵以致我买不起。expensive为形容词,so…that…句中要用形容词或副词；such…that…要用形容词修饰名词。其他两项不能引起从句。故选A。21教育网
五、目的状语从句
引导目的状语从句的从属连词有 so that , in order that (为了，以便)；in case(以防，以免)，lest(免得，以防)，for fear that(以免，惟恐)等。从句中一般含有can , could, may, might ,will, would等情态动词。如：www-2-1-cnjy-com
Please speak more slowly so that we can make full notes.【来源：21cnj*y.co*m】
请讲慢一点，以便我们能作完整的笔记。
I sent the letter by air mail in order that it might reach him in time.
这封信我以航空信发出，以便他能及时收到。
【考例】—More and more people in Beijing are learning English _______they can better serve the 2008 0lympic Games．
—I’ m sure they will．[宜昌]
A．because of B so that C．even though D．as if
[答案]B。[解析]本题也应从句意人手。越来越多的人学习英语，“为的是”能更多更好地为奥运服务。so that引导一个目的状语从句。2·1·c·n·j·y
六、让步状语从句
用来引导让步地点状语从句的从属连词有：though，although，even if／though， while(虽然、尽管)，for all (that)(尽管)whether…or(不论／不管……还是……))以及“疑问词+ever（whatever，wherever，whoever，however，）”和 “no matter +疑问词”等。Though he was very tired, he didn't stop working. 尽管他很累，他没有停止工作。
【考例1】—Shall we go on working? —Yes , I prefer to have a rest .（南昌）
A．when B．if C．because D．though
[答案] D。[解析]依据上句：我们继续工作吗？是的，尽管我想休息会。
【考例2】Edison never gave up, he failed many times. (四川)
A．and B．though C．or
[答案] B。[解析]依据题意：即使爱迪生失败多次，他也决不放弃。though用来引导让步状语从句。故选B。
七、比较状语从句
比较状语从句常用than或as…as引导。than表示两者的比较，as…as表示程度相同。如：
我比TOM高。I’m taller than Tom is.
他和我跑得一样快。He runs as fast as I do.
【考例】The days are_________ in our country.
A．as warm as B．as warmer as C．warm than D. so warm as
[答案] A。
【板书设计】
【教后反思】
附：状语从句连接词
状语从句
连词
时间
when, whenever, as, since, till, until, before, after, as soon as, once, the moment, immediately, the day, no sooner … than, hardly(scarcely)… when, the minute, the second, every(each) time
地点
Where, wherever, everywhere
条件
if, unless, providing/provided that, as(so) long as, on condition that, suppose/supposing that, in case, only if, if only
原因
because, since, as, now that, seeing that, considering that, in that, in view of the fact that (鉴于)
让步
though, although, even if(though), as, while, whatever, wherever, whoever, however, no matter +wh词，for all that, granting/granted, whether … or, in spite of the fact that, despite the fact that
比较
as…as, not the same as, not so…as, than
方式
as, as if(though) the way
目的
that, so that, in order that, in case, for fear that, lest
结果
so that, so… that, such … that, but that
课件33张PPT。专题复习17 状语从句 在时间状语从句中，通常要用动词的一般现在时态表示将来时，用一般过去时表示过去将来式。时间状语从句常用连词有： when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引导。一、时间状语从句(1) when 意为“当……时”，引导的时间状语从句表示主句的动作和从句的动作同时或先后发生。如：
I feel very happy when you come to see me.
你(们)来看我时，我感到很高兴。
When you are crossing the street, you must be careful.
你( 们)过街道时，一定要小心。1.考查when, while, as引导，表示“当……时候”。一、时间状语从句when 引导的时间状语从句中，可以用延续性动词，也可以用短暂性动词。如：
Someone knocked at the door when I was sleeping.
当我正在睡觉时，有人敲门。(延续性动词)
I will visit my good friend when I arrive.
当我到达时，我将去看望我的好友。(短暂性动词)
一、时间状语从句注意：when 也可以作并列连词，表示一个动作正在进行的时候，突然间发生了另外一件事。如：I was fishing by the river, when someone called for help.
我正在河边钓鱼，就在那时有人求救。We were working in the chemistry lab, when the lights
went out.
我们正在化学实验室工作，突然灯都熄灭了。
一、时间状语从句 (2)while 意为“当……时”“在……期间”，引导的时间状语从句表示主从句的动作在同一时期发生，常用延续性动词或表示状态的词。如：They rushed in while we were discussing problems.
当我们正在讨论问题时，他们冲了进来。
Father was cleaning the car while I was playing computer
games.
当我正在玩电脑游戏时，爸爸正在清洗汽车。一、时间状语从句(3) as 意为“当……时”“一边……一边……”，
主从句动作同时发生。如：As they walked, they talked happily.
他们一边走，一边高兴地交谈着。一、时间状语从句
注意：while 也可以作并列连词，表转折的关系，
相当于but，译为“然而”。如：I like listening to music, while my brother likes doing sports.
我喜欢听音乐，而我的兄弟爱好运动。[答案]A．[解析] 答语中when引导了一个时间状语从句，主句用了一般将来时态，所以从句用一般现在时态，可见正确答案在A与B之中。既然答语用了时间状语来回答，可见问句询问的也一定是时间，从而确定正确答案为A。【考例】—Mum,____ shall we have lunch? —We will have it when your dad______. [连云港]
A ． when；returns B ． where returns
C．where；will return D．when；will return2. before 意为“在……之前”，before的本意为“在……之前”，根据具体语境还可理解为“还没来得及/还没有……就……，趁着还没……就……，不知不觉就……，……才……”等。如：We cleaned the classroom before we left school yesterday.
昨天离开学校之前，我们打扫了教室。
He had been a cook before he went to college.
他上大学前曾当过厨师。一、时间状语从句[答案]B。[解析]这四个词(组)都可以引导时间状语从句，as soon as一……就．before在……之前；after在……之后；until直到……才。分析句子可以看出句意为“在你走之前把你的电子邮件地址给我好吗?”【考例】Could you please give me your e-mail address _________you go? [昆明]
A. as soon as B. before C. after D. until 一、时间状语从句3. until 和till 的用法：与肯定式的主句连用，主句谓语必须是延续性动词，till/ until表示“……直到……”；与否定式的主句连用，且主句谓语是非延缓性动词时，till/ until表示“直到……才……”。其强调句型为“not…until” ，位于句首时要采用倒装形式。如：I'll stay here until you come back.
我会待在这里，直到你回来。(stay 表示的动作可以持续）
He didn't go to bed until/before he finished his homework.
他直到做完作业才睡觉。(go to bed 表示的动作不能持续)
【考例1】一Hurry up. The bus is coming．
—Oh, no. We mustn’t cross the street ____the traffic lights are green．[福州]
A．after B. since C. while D．until [答案]D。[解析]本题应从句意人手。until常用于否定句中，构成"not…until"结构，意为“直到……才……”，该句意为“直到交通灯变绿，我们才能穿过马路”。【考例2】The kids didn’t start to fly kites in the playground ______the rain stopped.
A. if B. until C. whenever [成都][答案]B [解析] not…until…直到……才。“直到雨停孩子们才可以去操场放风筝”。【考例3】—Look! Here comes our school bus.
—No hurry. Don’t get on it _______it has stopped. [安徽]
A. until B. after C. since D. when[答案]A[解析]句中有don’t，可想not…until为固定结构，意为“直到……才……”。 引导条件状语从句的从属连词有if ,unless(=if …not如果不……，除非)，as/so long as ,while(=as long as 只要)，supposing(that),provided/providing(that),in case(假使)，on condition that(在……的条件下)等。我们主要看一下由 if 引导的条件状语从句。二、条件状语从句if 意为“如果”，引导一般条件状语从句时，主句用将来时，从句用一般现在时。如：
If it doesn't rain tomorrow, we will go there by bike.
如果明天不下雨，我们就骑自行车去那里。
If I get there early, I can see the doctor quickly.如果我早早地到那里，我就可以快点看病。【考例1】______you go to bed earlier, you won’t feel tired in the mornings．[沈阳市]
A. Unless B. Because C. If D. When[答案]C [解析]考查if引导的条件状语从句。“假如你早一点上床睡觉，那么你在上午就不会感到累。”【考例2】You won’t pass your exams ___________ you work harder. [广东]
A. when B. if C. unless D. after[答案]C[解析]when，after一引导的是时间状语从句，不合题意；if，unless引导的是条件状语从句，If不合句意，“除非你更加努力地学习，否则，你不会通过考试”。故用unless。 原因状语从句，常用的引导连词有 because (因为), as (由于)和 since (既然)。三者的区别是：在回答问题的时候，使用because；对于显而易见的原因，常用 as 或 since；as 和 since 的从句常放在主句之前，而 because 的从句常放在主句之后。如：三、原因状语从句—Why did you go？你为何去？
—I went because Tom told me to go.
那是因为汤姆叫我去。
As it was raining hard, we had to be indoors.
由于雨太大，我们只好待在家里。
Since you feel ill, you'd better not go to work.
既然你感觉不舒服，你最好不要去上班了。【考例】 Mark isn't coming to the concert __________ he has got too much work to do.
A．so B．until C．although D．because[答案]D[解析]so“因此”；until“直到”；although“虽然”；because“因为”。“太多工作要做”是“没有来音乐会”的原因。 结果状语从句，常由“so...that...” “such...that...”
(如此……以致……)引导。如：He is so short that he can't reach the apple.
他太矮了，够不到那个苹果。
It is such a heavy box that I can't move it.
这是个很重的箱子，我搬不动它。四、结果状语从句【考例】The camera is expensive I can’t afford it. (本溪)
so, that B. such, that
C. so, as to D. enough, that[答案] A [解析] 依据题意：这照相机太贵以致我买不起。expensive为形容词,so…that…句中要用形容词或副词；such…that…要用形容词修饰名词。其他两项不能引起从句。故选A。 引导目的状语从句的从属连词有 so that , in order that (为了，以便)；in case(以防，以免)，lest(免得，以防)，for fear that(以免，惟恐)等。从句中一般含有can , could, may, might ,will, would等情态动词。如：五、目的状语从句Please speak more slowly so that we can make full notes.
请讲慢一点，以便我们能作完整的笔记。
I sent the letter by air mail in order that it might reach him in time.
这封信我以航空信发出，以便他能及时收到。【考例】—More and more people in Beijing are learning English _______they can better serve the 2008 0lympic Games．
—I’m sure they will．[宜昌]
A．because of B ． so that
C．even though D．as if[答案]B[解析] 本题也应从句意人手。越来越多的人学习英语，“为的是”能更多更好地为奥运服务。so that引导一个目的状语从句。 用来引导让步地点状语从句的从属连词有：though，although，even if／though， while(虽然、尽管)，for all (that)(尽管)whether…or(不论／不管……还是……))以及“疑问词+ever（whatever，wherever，whoever，however，）”和 “no matter +疑问词”等。Though he was very tired, he didn't stop working. 尽 管 他 很累，他没有停止工作。五、让步状语从句【考例1】—Shall we go on working?
—Yes , I prefer to have a rest .（南昌）
A．when B．if C. because D．though[答案] D[解析] 依据上句：我们继续工作吗？是的，尽管我想休息会。【考例2】Edison never gave up, he failed many times. (四川)
A．and B．though C．or[答案] B[解析] 依据题意：即使爱迪生失败多次，他也决不放弃。though用来引导让步状语从句。故选B。 比较状语从句常用than或as…as引导。than表示两者的比较，as…as表示程度相同。如：
I’m taller than Tom is. 我比Tom高。
He runs as fast as I do. 他和我跑得一样快。七、比较状语从句【考例】The days are_________ in our country.
A．as warm as B．as warmer as
C．warm than D. so warm as
[答案] A。
