微课堂(现在完成时since和for的用法)ppt课件.ppt

Grammar B现在完成时现在完成时有关有关since和和for的用法的用法since表示表示“自自以来以来”，后面接，后面接“时间点时间点”常用的表示常用的表示“时间点时间点”的表达方式有：的表达方式有：自从自从2012年以来年以来since 2012自从两年前以来自从两年前以来since two years ago自从他进校以来自从他进校以来now(2014)2012since he came to this schoolNote：since后面如果接从句时，用一般过去时，如上题中的后面如果接从句时，用一般过去时，如上题中的camefor与与since则不同，后面接则不同，后面接“时间段时间段”，表示表示“已经有已经有时间了时间了”常用的表示常用的表示“时间段时间段”的表达方式有：的表达方式有：已经两年了已经两年了for two yearsfor 和和since之间可以相互转换之间可以相互转换如：如：for two years =since two years ago如果相对于现在的时间的话，也可以说成，如果相对于现在的时间的话，也可以说成，since 2012下面是习题时间下面是习题时间Grammar B现在完成时现在完成时有关有关since和和for的用法的用法请选用请选用for或或since填空填空1. _ 20002. _ half an hour3. _ I was born4. _ half an hour ago7. _ a couple of years8. _ MH 370 (马航马航370) disappeared5. _ last month6. _ 8 oclockGrammar B现在完成时现在完成时有关有关since和和for的用法的用法sinceforsincesincesincesinceforsince1. 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.用用for或或since将句子补充完整将句子补充完整Grammar B现在完成时现在完成时有关有关since和和for的用法的用法sincesinceforforsince中考链接：中考链接：1.My sister has learnt English _. 2.A. for twelve years agoB. since she was four C. twelve yeas ago D. at the age of four2. British Prince william(威廉王子威廉王子)and Kate have been married _. A. for nearly two months B. two months ago C. since two months before D. in 2011用法总结：用法总结：for + 一段时间一段时间 since + 一段时间一段时间+ ago since + 时间点时间点 since + 从句从句Grammar B现在完成时现在完成时有关有关since和和for的用法的用法BA能力提升：能力提升：1. They havent seen each other since last week. （同义句转换）（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）（同义句转换）Kitty has been in Hong Kong _ _ _ _.3. 我两个小时前就在这儿了。我两个小时前就在这儿了。4. 他已经睡了十个小时了。他已经睡了十个小时了。5. 李先生从李先生从2005年起住在这套公寓里。年起住在这套公寓里。6. 这些工人已经工作七个小时了。这些工人已经工作七个小时了。Grammar B现在完成时现在完成时有关有关since和和for的用法的用法for a weeksince a week agosince two days agoHe 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