时间状语从句专题培训课件.ppt
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- 时间 状语 从句 专题 培训 课件
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1、时间状语从句时间状语从句 1.Adverbial Clauses of Time:(时间状语从句)Different Kinds of Adverbial Clauses: 2.Adverbial Clauses of Reason(原因状语从句) 3.Adverbial Clauses of Conditions(条件状语从句) 4.Adverbial Clauses of Place (地点状语从句) 5.Adverbial Clauses of Purpose (目的状语从句) 6.Adverbial Clauses of Result(结果状语从句) 7.Adverbial Claus
2、es of Comparison(比较) 8.Adverbial Clauses of Concession(让步) 9.Adverb Clauses of Manner(方式状语从句 )I. 时间状语从句时间状语从句: when, while, as, after, before, since, until/till, as soon as, hardly/scarcelywhen, no soonerthan, every time, each time, the moment, the minute, the second, by the time , immediately .一、 w
3、hen/while/as When + (1)延续性动词 e.g. When I was young, I liked dancing. (2)瞬间性动词(不能用不能用 while) e.g. It was snowing when we got to the airport (3)表示“这时” “正在这时候” e.g. I was walking on the street when suddenly someone patted me on the shoulder. (4) 主从句动作先后发生(不能用不能用 while) e.g. When I got to the cinema, th
4、e film had already begun. While + (1) 延续性动词 e.g. While I slept, a thief broke in. (2) 表示两种情况对比,“然而” “而” e.g. They were surprised that a child should work out the problem while they themselves couldnt. (3) 表示“趁着时候”(强调主从句动作同时发生). e.g. Strike while the iron is hot. As 侧重主从句动作同时发生,常译为 “一边一边一边一边.” e.g.Th
5、e students took notes as they listened. ) “随着随着” e.g.As time goes by, we have gained more and more knowledge.注意 若主句谓语是短暂性动作,从句用延续性动词的进行时态表示在一段时间内正在进行的动作时,三者可以互换! When/While/As we were having an English class, a stranger broke in.Practice _l was walking down the street,I saw some policemen _they hear
6、d the news,they were surprised They shouted slogans _they passed the square.When/While/AsWhenas二、 before常见句型常见句型: It will be + 一段时间一段时间 + before. It was + 一段时间一段时间 + before. It wont be long before It wasnt long before肯定句意为肯定句意为 “多长时间后才多长时间后才” 否定句意为否定句意为“用不了多长时间就用不了多长时间就” It will be a long time befor
7、e we finish this dictionary. 我们需要很长的时间才把这部词典编译完。 It was not long before the thief was caught. 小偷不久就被抓住了。beforeIt will be half a year before I come back.It wont be half a year before we meet again.We sailed four days and nights before we saw the land.We hadnt run a mile before he felt tired. 肯定句肯定句 “
8、 才才” 否定句否定句 “就就”it will be +一段时间一段时间 before.多久之后才多久之后才.it wont be +一段时间一段时间 before.不久就不久就.1. Scientists say it may be five or six years _ it is possibleto test this medicine on human patients. 2. He was told that it would be at least three months _ hecould recover and return to work.3.Someone called
9、 me in the middle of the night, but they hung up _ I could answer the phone.before before before三、after 例: 1、He came to see me after I arrived. 2、Immediately after he was hurt, he was taken to the hospital. 注:before和after引导的状语从句,主从句发生的动作先后顺序很明确,因此after从句中的谓语动词常常使用一般过去时来代替过去完成时。 After he (had) finish
10、ed his homework, Tom began to play computer games.三 Since 注意 since 引导的时间状语从句,主句常用完成时,从句常用一般过去时。 He has written to me frequently since he was ill.句型 It is /has been + 一段时间+ since ,如果从句是延续性动词,,用一般过去时和现在完成时不同。 It is/has been two years since he was in the army. 他离开军队两年了。 It is/has been two years since h
11、e has been in the army. 他当兵两年了。1.-How long _ the shop_ open? -Since 1992. (=Since 15 years ago)2.-Since when _the country _ open to international trade? -1978, I suppose. 3._ 5 years _ he graduated from college. _ 2 years _ he smoked.has been has beenIt is since It is since Practice it is + 时间时间+ si
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