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1、2012英语中考复习专题 - 介词（二）考点知识精讲-时间介词（before, after, during, for, since, by from, until）一 基本含义：before: 指“在之前” 如：Please come before ten oclock. 请10点以前来。after: 表示“在之后”，是before的反义词。如：The meeting will end after 3:00p.m. 会议将在下午三点后结束。during：表示“在期间”如：He visited many nice places during his stay here.在他逗留期间他参观了许多美
2、丽的地方。within: 表示“在时间之内”如：I can finish it within an hour. 我在一个小时之内就可以把它做完。till(until): 在肯定句中表示“直到为止”如：You must wait for him till tomorrow. 你必须一直等他到明天。在否定句中表示“直到才”如：I didnt come home until 11oclock.直到11点我才回家。for： 表示“一段时间”since ：表示“自以来”，主句常用现在完成时。from： 表示“从（开始）”by 指“不迟于，到时为止，在以前”二 介词辨析：时间介词辨析1 （for, sin
3、ce,）1. for 表示“一段时间”，后接与数词连用的时间名词。多与完成时连用。如：I have been a soldier for 5 years. 我入伍已经五年了。2. since 表示“自以来”，表示从过去某一时刻到现在，后接时间点，主句常用现在完成时。如：Mr. Smith has lived here since 1998. 史密斯先生从1998年就住在这。总结：for与since 表示一段时间，但for与时间段连用，而since与时间点连用。随堂练习翻译：她已经病了几天了。_ 我们十年前就认识了。_时间介词辨析2 （from, by）1. from 表示“从（开始）”，多用于
4、“fromto”如：He started work from eight oclock. 他从八点开始工作。You can come anytime from Monday to Friday.周一到周五你什么时间来都行。2. by 指“不迟于，到时为止，在以前”如：I must finish my homework by lunch. 午饭前我必须做完作业。We had learned over 1000 words by the end of last term. 到上学期末为止，我们已经学了一千多了个单词了。注意：表示“在以前”时，before与by基本可以通用。但by还有“到时为止”之
5、意，此时可与完成时连用，而before一般不与完成时连用。随堂练习翻译：考试将从上午九点开始。_ 截止上月底你做了多少个模型？_时间介词辨析3 （after，in, during）1. after后可跟时间段，也可跟时间点；而in后必须跟一段时间。2. after与一段时间连用时通常用于过去时；而in只能用于将来时。如：Well hold a party after dinner. 晚餐后我们将举办晚会。He got a cancer and died after a year. 他患了癌症，一年后去世了。I will arrive in an hour. 我一小时后就到达.随堂练习1. He
6、 came back _ half an hour.2. Lucy will go out _ half an hour.3. They will visit her _ Friday.强化练习：1. They will have a math test _ two days.A .for B. at C. in D. after2. We got to the top of the mountain _ daybreak.A. in B. on C. from D. at3. Mr. Black got to Hangzhou _ a few days.A. in B. after C. o
7、n D. at4. He had to sell newspapers _ seven.A. at an age of B. at the ages of C. at the age of D. at age of5. I was born _ the night _ September 15.1978.A. in, on B. at, on C. at, in D. on, of6. I havent seen you _ the beginning of the summer holidays.A. during B. in C. for D. since7. I visited a lo
8、t of museums _the holiday.A. during B. in C. for D. since8. He often plays computer games _ 10 oclock to 11 oclock on Sunday.A. from B. at C. in D. since9. The train leaves at 6:30 p.m. So I have to be at the station _ 5:40 p.m. at the latest.A. until B. after C. by D. around10. Uncle Li has worked
9、in this factory _ 1980, so he has worked in this factory _ over 30 years.A. since, for B. for, since C. in, for D. from, since11. She has been away from the city _ about ten years.A. since B. from C. for D. before12. Its about ten years _ she left the city.A. since B. from C. for D. before13. The doctor will be free _.A.10 minutes later B. after 10 minutes C. in 10 minutes D. 10 minutes after14. How many English words had you learned _ last term? A. by the end of B. at the end of C. to the end of D. till the end of 15. He became a writer _ his twenties.A. at B. in C. by D. since
