状从句解和状修、形容、副或整个句子。
通常由副、介短、不定式、分和从句等担当。
例如：1. Naturally , our grandparents were pleased to get our phone call . (副 )2.We worked hard , from sunrise to sunset . (介状短 )3.To help my disabled aunt , I spend an hour working in her house every day . (不定式 )4.Seen from a distance , the farmhouse looked deserted . (去分 )5.I know how to light a camp fire because I had done it before .（原因状从句）状的位置比灵活，可以位于句首、句末或句中。
enough用作状修形容和副必后置。
状从句主要用来修主句或主句的。
一般可分九大，分表示、地点、原因、目的、果、条件、步、比和方式。
尽管种多，但由于状从句与构和用法相似，所以理解和掌握它并不。
状从句的关是要掌握引不同状从句的常用接和特殊的接即考点。
分列如下:1．状从句常用引： when, as, while, as soon as, while, before, after, since , till,until特殊引： the minute, the moment, the second, every time, the day，the instant, immediately , direc tly, no sooner ⋯ than, hardly ⋯ when, scarcely ⋯ whenI didn ’realizet how special my mother was until I became an adult.While John was watching TV, his wife was cooking.The children ran away from the orchard(果园 ) the moment they saw the guard. Nosooner had I arrived home than it began to rain.Every time I listen to your advice, I get into trouble.2．地点状从句常用引： where特殊引： wherever, anywhere, everywhereGenerally, air will be heavily polluted where there are factories.Wherever you go, you should work hard.3．原因状从句常用引： because, since, as, since特殊引： seeing that, now that, in that, considering that, given that, considering that, Myfriends dislike me because I ’ mhandsome and successful.Now that everybody has come, let ’begins our conference.The higher income tax is harmful in that it may discourage people from trying to earn more. Considering that he is no more than 12 years old, his height of 1.80 m is quite remarkable.4．目的状从句常用引： so that, in order that特殊引： lest, in case, for fear that，in the hope that, for the purpose that, to the end that The boss asked the secretary to hurry up with the letters so that he could sign them.The teacher raised his voice on purpose that the students in the back could hear more clearly.5．果状从句常用引： so ⋯ that, so⋯ that, such ⋯ that,特殊引： such that, to the degree that, to the extent that, to such a degree that, He gotup so early that he caught the first bus.It ’such a good chance that we must not miss it.To such an degree was he excited that he couldn ’sleept last night.6．条件状从句常用引： if, unless,特殊引： as/so long as, only if,providing/provided that, suppose that, in case that, on condition thatWe’ ll start our project if the president agrees.You will certainly succeed so long as you keep on trying.Provided that there is no opposition, we shall hold the meeting here.7．步状从句常用引： though, although, even if, even though特殊引：as(用在步状从句中必要倒装)，while ( 一般用在句首)，no matter⋯，in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whicheverMuch as I respect him, I can’agreet to his proposal.尽管我很尊敬他，我却不同意他的建。
The old man always enjoys swimming even though the weather is rough.No matter how hard he tried, she could not change her mind.He won’ tlisten whatever you may say.8．比状从句常用引： as(同比 ), than(不同程度的比 )so⋯; A is to B what /as X is to Y; no⋯mo 特殊引： the more ⋯ the more ⋯ ; just as ⋯，re than; not A so much as BShe is as bad-tempered as her mother.The house is three times as big as ours.The more you exercise, the healthier you will be.Food is to men what oil is to machine. 食物之于人，犹如油之于机器。
9．方式状从句常用引： as, as if, how特殊引： the wayWhen in Rome, do as the Roman do.She behaved as if she were the boss.Sometimes we teach our children the way our parents have taught us.10.状从句的化?状从句的省略状从句同具下列两个条件 :①主句和从句的主一致，或从句主it ；②从句主要是be 的某种形式。
从句中的主和be 常可省略。
例如：When ( the museum is ) completed , the museum will be open to the public next year .He’ ll go to the seaside for his holiday if (it is ) possible.另外，比状从句常省略。
例如：I ’ mtaller than he (is tall ).The higher the temperature (is), the greater the pressure (is ).就状从句而言 ,有了使言言意 ,常常将状从句行 "化 "。
状从句的 "化 "象在口中普遍 ,而且在高考中的复率也高。
因此 ,有必要其行全面、透的了解。
状从句的 "化 " 象常存在于以下五种状从句中:①由 if, unless等引的条件状从句 ;②由 althoug h, though, even if / though 等引的步状从句 ; ③由 when, while, as, before, after, until / till 等引的状从句 ;④由 as, as if 等引的方式状从句 ;⑤由 as, than 等引的比状从句。
下面五种情形作一。
(1)当状从句的主是it,且是 be ,it 和 be 要完全化掉。
例如 :If (it is) possible, he will help you out of the difficulty. 如果可能的 ,他会帮你脱困境。
You must attend the meeting unless (it is) inconvenient to you.除非情况你来不方便,否你必出席这次会议。
(2)当状语从句的主语和主句的主语一致时,从句可以将主语和be 动词简化掉。
常用于以下几种情形:a.连词 +形容词As (he was) young, he learned how to ride a bike.他小时候就学会了骑自行车。
Whenever (she is) free, she often goes shopping.她有空就去逛商店。
