现在完成时与过去完成时的区别-1.pptVIP

全国卷高考语法难点辨析之 现在完成时与过去完成时的区别The present perfect tense  The past perfect tense 昂立红太阳Yuki 形式 概念及用法 总结 形式 现在完成时 have/has+done I have waited here for an hour. She has waited here for an hour. 过去完成时 had + done By the end of this term we had learned 1000 English words.  概念 现在完成时 1.表示过去发生的对现在有影响的动作； I have seen the film many times，so I won’t go with you . 2.表示过去某一时间开始一直延续到现在的动作。 He has lived here since 1949. 用法 现在完成时 定义一 用法一 表示过去发生的某一动作对现在造成的影响或产生的结果 强调是过去动作与现在的联系,也就是强调现在的影响和结果，故常与表示与包括现在在内的时间副词，如 just,already,before,yet,never,ever等状语连用 eg.I have never heard of that before. She has already known the news 用法 现在完成时 定义二 用法二 表示过去某个时间开始的动作或存在的状态，一直持续到现在并可能还将持续下去 动词使用延续性动词,常与for或since引导的时间连用。如so far, by now, these days, in the last ten years… for+一段时间 eg. He has lived here for 5 years. since+ （表示过去某一时间的）时间点 eg. He has been here since 5 years ago. 概念 过去完成时 表示过去某一时刻以前已经开始并一直延续到这一时刻或在此刻前已经完成的动作，即“过去的过去”. By the end of last term we had learned 1000 English words. 1.表示在过去某一时间以前完成的动作或事件。是一个相对的时态，强调在某一时间点或动作之前发生的动作。 需要与表示过去的时间状语，不能离开过去的时间而独立存在。此时多与already,yet,still,just,before,ever,by,until 等连用 eg. He had read the text before he came to school. I had finished reading the book by 10:00 last night. 2.表示某一动作或状态在过去某时之前已经开始，一直延续到这一过去时间，并可能还将持续下去。 eg. By the end of last year,he had work in the factory for 10 years. 　　 过去完成时通常连用的时间状语： by by the end of + 过去的时间点 before eg. He had read the text before he came to school. 　 By the end of last year,he had work in the factory for 10 years. They had planted 100 trees before last Sunday. When 引导的从句 主语+过去完成时+ By the time 引导的从句 从句谓语动词为过去式 Before引导的从句 eg. When I got there, the bus had already gone. Before I met her, I had heard a lot about her. By the time we got to the cinema, the film had been on for five minutes. 表示意向的动词如hope,wish,expect,