就是在复合句中表示主句动作发生时间的状语从句;时间状语从句是所有状语从句中用得最经常的一种,并且用于引导时间状语从句的引导词也比较多,在学习时间状语从句时最重要的是记住这些引导词有哪些,它们的意思怎样等;到底时间状语从句可以用哪些词来引导呢 请看下文:
1. 用when引导:when表示“当……时候”;如:
Things were different when I was a child. 我小时候情况与现在不同;
People breathe more slowly when they are asleep. 人睡觉时呼吸比较缓慢;
2. 用while引导:while表示“当……时候”;如:
We must strike while the iron is hot. 我们要趁热打铁;
I went swimming while the others played tennis. 我去游泳,其余的人都打网球去了;
注意:while 所引导的时间状语从句中谓语动词必须是持续性的,不能是短暂性的;
3. 用as引导:as表示“当……时候”“随着”;如:return1
He dropped the glass as he stood up. 他站起来时,把杯子摔了;
We get wiser as we get old. 随着年岁的增长,我们也变得聪明些了;
4. 用before引导:before表示“在……之前”;如:
Turn off the lights before you go to bed. 睡觉前要关灯;
Before he went to university he was a worker. 上大学之前他是工人;
新员工述职报告
歌声与微笑串词5. 用after引导:after表示“在……之后”;如:
I will tell you after they leave. 他们走我再告诉你;
After you finish the letter show it to me.信写完后给我看看;
6. 用until / till引导:until / till表示“直到……”;如:
He waited until she was about to leave. 他等着一直到她准备离开;
I watched him until he disappeared in the distance. 我瞧着他直到他在远处消失;
这类句型的主句动词通常只能是,不能是终止性动词;但是,在否定句中,主句动词可以是终止性动词,此时构成not…ntil till…句式,意为“直到……才……”;如:
freedosShe didnt marry until she was over fifty. 她直到五十多岁才结婚;
Wed better not go until your sister arrives. 我们最好等你到了再走;
7. 用since引导:since表示“自从……以来”;如:
We have known each other since we were children. 我们从小认识;
Theyve moved twice since they got married. 他们结婚后已搬了两次家;
这类句子的主句通常用现在完成时;但是,当主句表示一段时间时,可用一般现在时代替现在完成时;如:
Its a long time since we met last. 好久没见面了;
How long is it since you came in London 你来伦敦有多久了
8. 用as soon as引导:as soon as表示“一……就……”;如:
The boys ran off as soon as we appeared. 我们一来,孩子就都跑了;
He started as soon as he received the news. 他一接到消息就出发了;
表示“一……就……”这一意思的连词,除as soon as外,还可用the moment, the minute, the instant等;如:
I want to see him the minute he arrives. 他一来到我就要见他;
The moment I saw him I knew there was no hope. 我一看到他就知道没希望了;
9. 用every time等引导:any time, each time, every time, the first time, the last time, the next time等有时也可用连词,引导时间状语从句,分别表示“任何时候”“每次”“第一次”“最后一次”“下次”等;如:
You can call me any time you want to. 你随时都可以给我打;
Each time I went there, I saw him working. 我每次去那儿都看见他在工作;
Every time I call on him, he is out. 我每次去访问他,他都不在;
Next time you come in, please close the door. 下次你进来,请关门;
10. :当主句为将来时态或含有将来意义时,时间状语从句习惯上要用一般现在时表示将来意义,而不能直接使用将来时态;如:
■趁早动手,免得忘了;
误:Do it before you will forget.
正:Do it before you forget.
before引导的时间状语从句不能直接使用将来时态,而通常用现在时表示将来意义;
让步状语从句
 
1. 用although / though引导:although与though虽然拼写不同,但意思相同,都表示“虽然”,常可互换;如:
Though they are twins, they look entirely different. 他们虽是孪生,但是相貌却完全不同;
Although she didnt say anything I sensed that she didnt like the idea. 她虽然什么也没说但我已意识到她不喜欢这个主意;
海苔寿司注意,不要按汉语习惯说although…but…;如:
尽管她父亲在公司里,但她那份工作却是靠自己得到的;
误:Although her father is in the firm, but she got the job on her own.
正:Although her father is in the firm, she got the job on her own.
2. as 作“虽然”解,时,从句中的状语、表语或动词必须置于句首,though 引导的让步状语从句,
也可将这些成分置于句首,但 although 等其它词引导的让步状语从句不能将这些成分前置;如
Hard as/though they tried =Although/Though they tried hard, they couldn’t make her change her mind. 尽管他们做了很大努力,却没法让她改变主意;
时,若提前的是可数名词单数,要省略不定冠词;如:
Child as he is, he knows a lot. 虽然他是孩子,但他却很懂事了;
3. 用even though / even if引导:even though和even if意思相同,均表示“即使”,常可互换;如:
Even though you have a lot of money, I wont love you. 即使你有很多钱,我也不会爱你;
Even if you saw him pick up the money, you cant be sure he stole it. 就算你看见是他拾起的钱,你也不能肯定钱就是他偷的;
4. 用whether…or引导:whether…or…的意思是“无论……还是……”“不管……还是……”;如:
Ill do it whether you like it or not. 不管你是否喜欢,我都要做;
Whether we help him or not, he will fail. 不论我们帮助他与否, 他都将失败;
5. 用特殊词引导:除上面提到的最常用的引导让步状语从句的词语外,有时还可用那些以-ever结尾的词语来引导,如whatever, whoever, however, whenever, wherever等,它们的意思与no matter what, no matter who, no matter how, no matter when, no matter where等,意思是“无论什么”“无论是谁”“无论多么”“无论什么时候”“无论什么地方”等;如:
Whatever you say, I believe you. 无论你说什么,我都相信你;
Whoever telephones, tell them Iwhether是什么意思m out. 不管是谁打,都说我出去了;
However much he eats, he never gets fat. 无论他吃多少,他都不发胖;
6.另外,还有一个大家比较熟悉的词也可引导,那就是while,它除了表示“当……时候”外,还可表示“尽管”“虽然”,此时引导的是让步状语从句;如:
While we dont agree we continue to be friends. 尽管我们意见不同,我们还是朋友;
表示“虽然”的连词不能与表示“但是”的连词 but 连用,但可以 yet still 等副词连用;如
译:虽然当时正下着雨,他还是到那里去了;
误:Though it was raining, but he went there.
正:Though it was raining, he went there.
正:It was raining, but he went there.
正:Though it was raining, yet he went there.