英语四级语法指导：状语从句

 　　在备考英语四级的过程中，各位同学一定不要忽略了语法，语法在各个题型中都有体现，而且语法学的好对做题也有非常大的帮助，本文就为各位同学介绍了英语四级常用语法，供同学们参考。

　　状语从句

　　状语从句中以下四种从句考得较多，这里给予简单介绍。

　　1) 时间状语从句

　　时间状语从句主要由以下连词引导：when, whenever, as, while, since, until, till, before, after, as soon as, once, hardly (scarcely) … when, no sooner … than。

　　I will discuss the matter with you when we meet tomorrow.

　　He didn’t go to sleep until he finished doing his homework.

　　You have changed a lot since we met last time.

　　时间状语从句还可由某些可充当连词的名词(the moment, the instant¹, every time,等)和副词(instantly, directly²等)引导：

　　I will tell you the news the instant I know.

　　Directly the teacher came in everyone was quiet.

　　Note:

　　① before除了可表示 “在…之前”外，还可用来强调主句所表达的时间、距离很长或花费的力量相比较大，可译为“…才”。(“not … before” 可用来强调主句所表达的时间、距离很短或花费的力量相比较小，可译为“…就”)。

　　It was a long time before I got to sleep again.

　　They had not been married a month before they quarreled.

　　② 如果位于when引导的分句之前的主句使用过去进行时、过去完成时或“was/were about to, was/were on the point of”等结构时，when表示突然发生某事，可译为“正在…突然”或“刚…就”等。这时，不能够用as或while来代替when。

　　I was walking on the street when I ran into my old friend John.

　　She had just fallen asleep when the telephone rang.

　　We were about to leave when it began to rain.

　　2) 条件状语从句

　　条件状语从句主要由以下连词引导：if, unless, providing/provided³ (that), suppose/supposing (that), on condition (that), as/so long as, in case等。

　　So long as you work hard, you will surely⁴ achieve good results in examinations⁵.

　　I shall return next Thursday unless something unexpected⁶ happens.

　　I will go provided that you go with me.

　　Please give this letter to John in case he comes.

　　3) 让步状语从句

　　让步状语从句主要由以下连词引导：though, although, even if, even though, whatever, however, whoever⁷, wherever, no matter how/ what/ where/ when等。以下介绍几种较特殊的让步状语从句。

　　(1) while引导的让步状语从句多放在句首，while相当于although，表示“尽管”，“虽然”。

　　While I admit I did it, I didn’t intend to.

　　While I understand what you say, I can’t agree with you.

　　(2) 短语“even now/then/so”相当于“though it is/was true”，表示“尽管如此”，“尽管这样”。

　　The fire was out, but even so, the smell of smoke was strong.

　　I’ve tried my best, but even now/then she is not satisfied⁸.

　　(3) as引导的让步状语从句要倒装。

　　Child as he was, he could speak four languages.

　　Hard as she tried, she failed to get the job.

　　4) 比较状语从句

　　比较状语从句主要由以下连词引导：(not) as … as, (not) the same as, (not) such … as, not so … as, than, the + 比较级…, the +比较级…等。

　　We have had a lot more rainfall this year than we had last year.

　　She can speak English as fluently⁹ as her teacher (can).

1 instant   

adj.紧迫的；立即的；本月的；已配制好的时刻；瞬息，霎时

参考例句：

• If you don't leave this instant,I will scream.你要是不马上离开，我就喊了。
• It all happened in an instant.这一切都发生在一刹那间。

2 directly   

adv.直接地，径直地；马上，立即

参考例句：

• I will telephone you directly I hear the news.我一听到消息，马上打电话给你。
• She answered me very directly and openly.她非常坦率地、开门见山地答复了我。

3 provided   

conj.假如，若是；adj.预备好的，由...供给的

参考例句：

• Provided it's fine we will have a pleasant holiday.如果天气良好，我们的假日将过得非常愉快。
• I will come provided that it's not raining tomorrow.如果明天不下雨，我就来。

4 surely   

adv.确实地，无疑地；必定地，一定地

参考例句：

• It'should surely be possible for them to reach an agreement.想必他们可以达成协议。
• Surely we'll profit from your work.我们肯定会从你的工作中得到益处。

5 examinations   

n.检查( examination的名词复数 )；考试；考查；试题

参考例句：

• He had been forced to incriminate himself in cross-examinations. 他在盘问中被迫受到牵连。 来自《简明英汉词典》
• Examinations are hanging over her head—that's why she can't sleep at nights. 她大脑里想的都是考试，所以晚上无法入睡。 来自《简明英汉词典》

6 unexpected   

adj.想不到的，意外的

参考例句：

• I always keep some good wine in for unexpected guests.我总保存些好酒，用来招待不速之客。
• His promotion was unexpected.他的升迁出人意料。

7 whoever   

pron.无论谁，不管谁；任何人

参考例句：

• I'll find the person who did this,whoever he is.我要找出干这件事的人，不管他是谁。
• Whoever does best will get the prize.谁做得最出色谁就得奖。

8 satisfied   

adj.满意的，满足的；清偿过的；确信的，毫无疑问的v.使满意( satisfy的过去式和过去分词)

参考例句：

• She's never satisfied with what she's got. 她对自己的所得从不感到满足。
• He had a self-satisfied smirk on his face. 他脸上挂着得意扬扬的笑容。

9 fluently   

adv.流利地，流畅地

参考例句：

• He speaks English very fluently.他说英语说得很流利。
• He could speak English as fluently as an Englishman.他说英语和英国人一样流利。