初中英语现在完成时38903.ppt

现在完成时 2017.11.24;春天还会远吗 ? will it still be far in spring?;现在完成时态;现在完成时的构成形式;助动词have/has可和前面的主语缩略为’ve,’s.如 they’ve, we’ve, he’s, it’s; you’ve has not=hasn’t have not=haven’t;过去分词的变化;1.肯定句:;用来表示之前已经发生或完成的动作或状态，而其结果却和现在有联系: 动作或状态发生在过去,但它的影响现在还存在。 They have left. --他们已经离开了,也就是说现在他们人不在这里 I have had my lunch. --我已经吃过午饭了,也就是说我现在不饿;now;和现在完成时连用的时间状语;1.Mr. Black left China in 1990. Mr. Black ______________________China since 1990. 2.The hero died five years ago. The hero __________________ for five years. 3.The meeting began two minutes ago. The meeting _________________ for two minutes. 4.We borrowed two books last week. We _______________ the two books for a week. 5. Sally joined the League two years ago. Sally _______________ the League for two years. ; 延续性动词：表示可以延续一段时间的动作或状态。如：be,drink,fly,eat,keep,lie,live,rain等。 瞬间性动词：表示不能延续的动作，即动作发生后立即结束。如：begin,arrive,borrow,buy,break,close,come,fall,finish,go,leave,lend,mary,reach,receive,open,,start,stop等。 瞬间性的动词是不能持续的，所以不能和表示一段时间的状语连用。;? since 用来说明动作起始时间— “自从……” for用来说明动作延续时间长度— “长达……” 　　I have lived here for more than twenty years.　　I have lived here since I was born. 　　My aunt has worked in a company since 1949.　 　　I have not heard from my uncle for a long time.;二、用since和for填空1.____two years 2.____two years ago3.___last month 4.___ 19995.___yesterday 6.__4 o’clock7__4 hours 8.___an hour ago9.___we were children 10.__ lunch time11.___ she left here12. He has lived in Nanjing __ the year before last.13. I’ve known him __ we were children.14. Our teacher has studied Japanese __ three years.15. She has been away from the city __ about ten years.16. It’s about ten years __ she left the city.;瞬间性动词例如come,go,leave等，不和表示延续性的时间状语连用，例如for two hours或者是since last month。如果我们想用它们来表达延续性的状态，就要把他们转化成对应的延续性动词。; He died 10 years ago. --- He ____ ____ ____ for 10 years / since 10 years ago.