人教版八年级英语下册《现在完成时态》课件-29.ppt

1、Present Perfect Tense 现在完成时态 Present Perfect Tense-现在完成时冬天已经来了，Winter has already come,春天还会远吗？Will it still be far in spring?现代完成时态1、含义：表示动作发生在过去，目前可能已经完成或还在继续，强调动作对现在产生结果和影响。现代完成时态(1).I have seen the film twice.(2).She has lived here since 1995.(3).He has been to shanghai.(4).She has gone to shangh

2、ai.现代完成时态2、结构(1).肯定句：主语+have/has+动词过去分词+其它成分（have/has是助动词，has用于主语是第三人称单数，其他人称一律用have)We have had already breakfast.My aunt has gone to Beijing.现代完成时态(2).否定句：主语+havent/hasnt+动词过去分词+其它成分I havent seen him these days.My grandma hasnt learnt English.现代完成时态(3).一般疑问句及其回答-Have you read this book?-Yes,I have

3、.-No,I havent.现代完成时态现在完成时用法:1.表示动作在过去完成，强调对现在产生的影响和结果。I have finished my homework now.2.表示到目前为止曾经经历或没经历的事情。Have you ever been to the Great Wall?现代完成时态3.常于现在完成时的时间状语：just,already,yet,ever,never,before,these days等。He has never been to a zoo at night.现代完成时态4.注意事项：1).表示过去的固定时间，如ago,last,yesterday等以及由whe

4、n提问的句子不能与现在完成时连用。I have gone shopping yesterday.()I went shopping yesterday.()When have you gone there.()When did you go there.()现代完成时态2).短暂性动词不能与表示延续的时间连用。而否定则可以用。（常见动词：buy,borrow,leave,die,come,go,begin,stop,lose.）He has left home for 30 days.()He hasnt left home 30 days.()现代完成时态3).have/has been to 与have/has gone to区别1).have/has been to表示去过某地，已经回来了。可与once,twice,never,ever等连用。eg:He has been to Japan twice.现代完成时态2).have/has gone to表示去了某地，还没回来，不能与以上词连用。eg:Tom is not here,he has gone to the office.