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1、Grammar B现在完成时有关since和for的用法,since表示“自以来”，后面接“时间点”,常用的表示“时间点”的表达方式有：,自从2012年以来,since 2012,自从两年前以来,since two years ago,自从他进校以来,now(2014),2012,since he came to this school,Note：since后面如果接从句时，用一般过去时，如上题中的came,for与since则不同，后面接“时间段”，表示“已经有时间了”,常用的表示“时间段”的表达方式有：,已经两年了,for two years,for 和since之间可以相互转换,如：fo
2、r two years,=since two years ago,如果相对于现在的时间的话，也可以说成，since 2012,下面是习题时间,Grammar B现在完成时有关since和for的用法,请选用for或since填空,1. _ 2000,2. _ half an hour,3. _ I was born,4. _ half an hour ago,7. _ a couple of years,8. _ MH 370 (马航370) disappeared,5. _ last month,6. _ 8 oclock,Grammar B现在完成时有关since和for的用法,since
3、,for,since,since,since,since,for,since,1. He has lived in Zhenjiang _ the year before last.2. Ive known him _ we were children.3. Our teacher has studied Japanese _ three years.4. She has been away from the city _ about ten years.5. Its about ten years _ she left the city.,用for或since将句子补充完整,Grammar
4、B现在完成时有关since和for的用法,since,since,for,for,since,中考链接：,17.MysisterhaslearntEnglish,.,A.fortwelveyearsago,B.sinceshew,asfour,C.twelveyearsago,D.attheageoffour,17.MysisterhaslearntEnglish,.,A.fortwelveyearsago,B.sinceshew,asfour,C.twelveyearsago,D.attheageoffour,My sister has learnt English _. A. for tw
5、elve years agoB. since she was four C. twelve yeas ago D. at the age of four,2. British Prince william(威廉王子)and Kate have been married _. A. for nearly two months B. two months ago C. since two monthsbeforeD. in 2011,用法总结：,for + 一段时间 since + 一段时间+ ago since + 时间点 since + 从句,Grammar B现在完成时有关since和for
6、的用法,B,A,能力提升：,They havent seen each other since last week. （同义句转换）They havent seen each other _ _ _.They havent seen each other _ _ _ _.2. Kitty has been in Hong Kong for two days. （同义句转换）Kitty has been in Hong Kong _ _ _ _.3. 我两个小时前就在这儿了。4. 他已经睡了十个小时了。5. 李先生从2005年起住在这套公寓里。6. 这些工人已经工作七个小时了。,Grammar B现在完成时有关since和for的用法,for a week,since a week ago,since two days ago,He has slept for ten hours.,These workers have worked for seven hours.,Mr. Li has lived in this flat since 2005.,I have been here since two hours ago.,= for two hours,= since ten hours ago,
