当前位置：首页 > 高三英语寒假作业专题10状语从句（学）
能否回答 区别 位置 内涵 语气 能否被强调 why becau se 主句前或后 直接因果关强 能 能 系 因 为 as由主句前或后 于 双方都知道 弱 不能 不能 since 主句前 的原因 / now that 既然 ——Why are you absent from the meeting? 你为什么没有参加会议？ ——Because I am ill.
As it is raining,we should not go to the park. 由于下雨，我们不该去公园了。
Now that/Since everybody is here, let's begin our meeting. 既然大家都在这儿，咱们开始开会吧。 注意：
(1) for作连词也有“因为”的意思，但for是并列连词，连接并列分句。We should be more Careful,for it is already dark. 天色已晚，我们应更小心些。
(2) when也可引导原因状语从句，意为“既然”。
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How can he succeed when he won't work? 既然他不肯工作，那他怎么会成功呢？
(3)一些介词短语可表示原因：because of，thanks to，due to， owing to等。 四、目的状语从句
引导目的状语从句的从属连词（词组）有：so that，in order that,for fear that,in case,lest等。 1. in order that与so that .
两个连词（词组）都意为“以便”…．；为了……”，引导的状语从句中须用may (might)，can (could)，will (would)等情态动词。in order that比so that正式，引导的状语从句可置于主句 之前或之后；丽so that引导的从苛负能置于主句之后。
I'll speak slowly so that you can understand me.我会慢慢地说，以便你能理解我。
In order that we might see the sunrise, we started for the peak early.为了能看到日出，我们早早地就向山顶出发了。
2．for fear that,in case 与lest.
这些从属连词（词组）引导的目的状语从句中谓语动词要用(should+)动词原形，它本身带有否定意义，相当于so that...not…或in order that… not…。
The boy hid himself behind the tree in case/for fear that his father should see him． 这个男孩躲在树后，以免他的父亲看到他。
Take your raincoat in case/lest it should rain.带着你的雨衣以免下雨。 注意：
目的状语从句可用so as to，in order to等不定式来替换，但主句与从句主语须一致。 He ran fast so that he might arrive there before ten o'clock. =He ran fast so as to arrive there before ten o'clock. 他快跑以便在10点以前赶到那里。
如果主句与从句的主语不一致，要用for引导不定式的逻辑主语。
My mother gets up early every morning to cook breakfast so that I can go to school on time. …so as for me/in order for me to go to school on time. 妈妈每天早晨早起做早饭，以便我能按时到校。
五、结果状语从句
1．引导结果状语从句的从属连词有：so that，so…that…，such...that...。
2．在非正式语体中，由so…that…，such...that...引导的句子中that可以省略，注意其结构
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形式：
so+形容词／副词+that从句
so+形容词+a/an+可数名词单数形式+that从句 so+many/much/few/little（少的）+名词+that从句 such+a/an+形容词十可数名词单数形式+that从句 such+形容词十可数名词复数形式／不可数名词+that从句 such+a lot of/lots of+名词+that从句、
Mike is such an honest worker .that we all believe him: Mike is so honest a worker that we all believe him. 迈克是如此诚实的一个工人，以至于我们都相信他。
It is such fine weather that we all want to go to the park. 天气如此好，以至于我们都想去公园．。
He earned so little money that he couldn't support his family.他挣的钱如此少，以至于不能养家糊口。
3.so或such置于句首，主句用倒装语序。
So excited was he that he could not fall into sleep.他太激动了，以至于不能入睡。 4．too…to…，enough to...，so…as to…等也可表示结果。 He got up too late to catch the bus. He got up so late as to miss the bus.
He didn't get up early enough to catch the bus. 他起得很晚没有赶上公共汽车。 六、条件状语从句
引导条件状语从句的从属连词有：if，unless（一if．．．not除非），so (as) long as（只要），in case（万一），on condition that（条件是），suppose/supposing（假设，用于问句），provided/providing that等。
You'll fail the exam unless you study hard. (…if you don't study hard.) 如果你不努力学习，考试就会不及格。
As long as you don't lose heart,you will succeed.只要你不失去信心，你就会成功的。
Suppose/Supposing (that) they refuse us, who else can we turn to for help?假设他们拒绝了我们，我们该向谁寻求帮助？
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In case there is a fire,what will you do first?万一发生火灾，你会先做什么？ 七、方式状语从句
引导方式状语从句的从属连词有：as，as if,as though。
1．当as if/though引导的方式状语从句所表示的情况是事实或具有很大的可能性时，通常用陈述语气。
I feel as if I have a fever.我觉得我好像发烧了。
2．当从句中所表示的情况不是事实时，通常用虚拟语气，现在的情况用过去时态，过去的情况用过去完成时。
Do as you are told to,or you'll be fired. 按照告诉你的那样做，否则你就会被解雇。 The old lady treats the boy as if he were her own son.那位老妇人对待那个男孩就好像他是她自己的儿子。 八、让步状语从句
1．although/though（尽管，虽然），even though/even if（即使），as(虽然)等引导让步状语从句。
(1) although与though
although与though意思相同，一般可互换，都可以与yet，still或nevertheless连用，但不能和but连用。
He is unhappy though/although he has a lot of money.虽然他有很多钱，他并不快乐。 Although/Though it was raining hard, yet they went on playing football.虽然雨下得很大，他们仍然继续踢足球。 注意：
①though还可用作副词，意为“可是，然而”，置于句末。
He said he would come;he didn't,though.他说他会来，可是他没有来。 ②though引导的让步状语从句还可用于倒装结构，此时用法同as。
(2)as
as引导的从句一般放在主句之前，须用倒装语序。从句中的表语、状语或动词原形置于句首。若表语是可数名词单数，前置时要省略不定冠词。
Child as he is,he knows a lot.尽管他是个孩子，却懂得很多。
Much as I like it,I won't buy it,for it's too expensive.虽然我很喜欢它，但我不会买的，因为它太贵了。
Try as he might,he could not find a job.不管他怎样努力，他还是找不到工作。
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