一段时间 +since
表示从这个时间开始到现在---自从~~~以来
用法上It + ( 现在完成时 ) + 一段时间+ since + ( 一般过去时 )
例句:
1. It is / has been four days since I caught a cold. 我感冒已四天了。
2. It is / has been two weeks since we met last. 自从我们上次见面以来已过了两周。
我们会发现“It is +段时间+since…..句型”在翻译成中文时,有绝然相反的两种意思,一是,“。。。。。做。。。有多长时间了。”另一是“。。。。。有多长时间没做。。。了。”怎样以简洁的讲解让学生明了。我的意思是:先让比较两个句子的意思(中英文对照)。如,
It is five years since he became a soldier.他当兵已经五年了。
It is five years since he was a soldier..他不当兵已经五年了。
再如,
It is two weeks since he fell ill .他病了两星期了。
It is two weeks since he was ill. 他病愈两星期了。
让学生观察since 从句中动词的特点吧。第一种情况的动词是短暂性动词。表示从这点开始。而第二种则是状态性的,可延续的。
练一练:
1. He went abroad in 1997 and has never come back. It is eleven years since he ____the company at home.
A. takes charge of B. took charge of C. is in charge of D. was in charge of
**答案选D不选B
2.They asked me to have a drink with them.I said it was nine years since I______a good drink.
A.enjoyed B. was enjoying C. had enjoyed D. had been enjoying
** 答案用 C
3.This is really a splendid evening. It’s years _____I enjoyed myself so much.
A. when B. that C before D .since
看看这些你就明白了,学英语要结合具体的语境,不要死记语法
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