Since 和 for 的用法
表示过去已经开始持续到现在的动作或状态常用的时间状语有:for, since, how long, so far, these days等。
Since+过去点的时间,for+一段时间(数词+量词),此划线部分用how long提问。
一、since短语或从句表示过去的动作延续至今,since之后的时间为一点。 如:
Mr. Smith has worked here since 1984. 1984年以来,史密斯先生一直在这工作。
He’s learned about 5,000 English words since he went to college. 他上大学以来大约学了五千个英语单词。
二、for短语表示动作延续多长时间,for的宾语为时间段。 如:
We have known each other for twenty years. 我们认识有二十年了。
I haven’t seen her for a long time. 我好久没有见到她了。
练习:用since和for填空
1) ______ two years 2) _______ two years ago 3) _______ last month
4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock
7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children
10) _____ lunch time 11) ______ she left here
1. He has lived in Nanjing ________ the year before last.
2. I’ve known him __________ we were children.
3. Our teacher has studied Japanese _________ three years.
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