幻灯片 1
专项语法十三 状语从句
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幻灯片 2
要点精析
状语从句又称副词性从句，在句中作状语，修饰主句中的动词、形容词或副词等。状语从句放在主句之前时，常用逗号分开；放在主句之后时，一般不用逗号。状语从句可分为时间、条件、原因、让步、目的、结果、方式、比较、地点等状语从句。
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幻灯片 3一、时间状语从句
1．表示时间的状语从句可以由when, whenever, as, while, before, until, ever since, as soon as等词引导。
When completed, the tunnel will be the longest in the world.
完工后，这就是世界上最长的隧道。
Please write it down before you forget it.
趁你现在没忘记把它写下来。
It will be half a year before I come back.
我半年之后才回来。
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幻灯片 4
例 (2010·安徽，33)Just use this room for the time being, and we'll offer you a larger one______it becomes available.
A．as soon as B．unless
C．as far as D．until
解析：句意：先暂时用着这间房间，一找到房子，我们将给你提供大一点的房间。本题考查连词。as soon as表示“一……就……”，符合句意，其它三项不合题意。
答案：A
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幻灯片 52．名词词组引导时间状语从句：every/each time“每一次”；the moment/minute“一……就……”；the first/second time“第一/二次”；the last time“最后一次”；the day“那一天”；the week“那一周”等。
Every time I see him, he looks miserable.
每次我看见他，他都是一副愁眉苦脸的样子。
He said he'd phone you the moment he got home.
他说他一到家就给你打电话。
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幻灯片 6
3．as soon as, instantly, directly, immediately等表示从句动作一发生，主句动作随即发生，通常意为“一……就……”，也可引起表示时间的状语从句。
I came as soon as I heard the news.
我一听到消息就马上来了。
I came directly I got your message.
我一收到你的消息就来了。
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幻灯片 74．no sooner...than和hardly...when引导的从句表示“刚……就……”。主句中的动词一般用过去完成时，从句用过去时。若把no sooner, hardly提到句首，主句须倒装。
No sooner had he sat down than the phone rang.
他刚坐下，电话铃就响了。
Hardly had the game begun when it started to rain.
比赛刚刚开始，天就开始下起雨来。
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幻灯片 8例 (2010·福建，26)The girl had hardly rung the bell __________the door was opened suddenly, and her friend rushed out to greet her.
A．before B．until
C．as D．since
解析：考查连词。had hardly done sth. before/when表示“一……就……”。又如：We had hardly started before/when it began to rain.我们刚出发，天就开始下雨。
答案：A
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幻灯片 9二、条件状语从句
条件状语从句由if(如果)，unless(除非)，once(一旦)，in case(万一); so(as)long as(只要), on condition that/on one condition(以……为条件)等词引导。如果主句是将来时，条件状语从句要用一般现在时表示。
Unless some extra money is found, the theatre will close.
如果不能额外弄一些钱，剧院就得关闭。
Ron lent me the money on condition that I pay it back next month.
罗恩把钱借给我，条件是下月归还。
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幻灯片 10
例 (2010·辽宁，31)I agree to his suggestion________the condition that he drops all charges.
A．by B．in
C．on D．to
解析：句意：我同意他的建议，条件是他降低费用。on the condition that“条件是……”，引导条件状语从句。
答案：C
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幻灯片 11
三、原因状语从句
原因状语从句常用because, since, as, for引导，还可用seeing that(既然), now that(既然)，considering that/who/how...(考虑到……), in that(因为)，not that...but that(不是因为……而是因为)等引导。
Now that they've got to know each other a little better, they get along just fine.
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幻灯片 12
由于彼此之间有了进一步了解，他们相处得不错。
John did quite well in his exams considering how little he studied.
考虑到约翰才学了那么一点点，他考得已很不错了。
The situation is rather complicated in that we have two managing directors.
由于我们有两位总经理，所以情况很复杂。
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幻灯片 13四、让步状语从句
让步状语从句由though(although), even if(even though), no matter how/where/what..., whatever, however, whoever等引导。
Although the car is old it still runs well.
汽车虽然很旧，但跑起来仍然不错。
No matter how hard he tried, he couldn't get her to change her mind.
不管他怎么努力劝说，也没能使她改变主意。
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幻灯片 14
例 (2009·陕西)My parents don't mind what job I do________I am happy.
A. even though B. as soon as
C. as long as D. as though
解析：考查连词。even though“即使”；as soon as“一……就……”；as long as“只要”；as though“仿佛”。句意：我父母不介意我做任何工作，只要我高兴。故as long as符合语境。
答案：C
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幻灯片 15
五、目的状语从句
目的状语从句常由that, so that, in order that, lest(以免，以防)，for fear that等引导，放在主句之后。目的状语从句常用情态动词may(might), can(could)等。lest, for fear that后面常用“(should)＋动词原形”的虚拟语气。
We pray that he may recover soon.
我们祈求他早日康复。
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幻灯片 16六、结果状语从句
结果状语从句由so that, so...that, such that, such...that等词引导。
Many contestants later failed drug tests, so that the race had to be rerun.
许多参赛者后来都没有通过药检，赛跑只得重新进行。
The nature of the job was such that he felt obliged to tell no one about it.
这种工作的性质就是如此，他觉得只好秘而不宣了。
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幻灯片 17
例 (2010·唐山摸底考试)He was so deep in thought, thinking of the problem, ________he knocked into the tree without noticing it.
A．when B．while
C．because D．that
解析：考查状语从句的引导词。so...that表示“如此，以致”。句意：他思考问题太投入了，以致一不留神儿撞到了树上。
答案：D
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幻灯片 18
七、方式状语从句
方式状语从句由as, just as, as if, as though等词引导。
We'd better leave things as they are until the police arrive.
在警察到来之前，我们最好保持现场原样。
You look as if you've had a good time.
你看起来好像玩得挺开心。
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幻灯片 19
八、比较状语从句
比较状语从句由as...as, than, not so...as, the more...the more等词引导。
My brother is not as tall as me.
我哥哥没我高。
It's a beautiful dress but it's much more than I can afford.
这件连衣裙很漂亮，不过太贵了，我买不起。
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幻灯片 20九、地点状语从句
地点状语从句由where, wherever, anywhere, everywhere等词引导。
We should go where the Party needs us most.
我们应到党最需要我们的地方去。
You are free to go wherever you like.
你愿意去哪里就去哪里。
Where there is a will, there is a way.
有志者，事竟成。
Wherever there is smoke, there is a fire.
无火不生烟。(无风不起浪)
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幻灯片 21
例 (2009·山东)The little girl who got lost decided to remain________she was and wait for her mother.
A．where B．what
C．how D．who
解析：考查状语从句。句意：这个迷路的小女孩决定待在原地等她妈妈。故应选择where来引导地点状语从句，答案为A。
答案：A
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