现在完成时态讲解.ppt

Presentperfecttense现在完成时态一、现在完成时谓语动词的构成:助动词have/has(not)+V-ed(过去分词)?I______________(finish)positionalready.?He___________(learn)Englishforthreeyears.?We/You/They….?She….havefinishedhaslearned▲现在完成时态的含义是表示过去发生的或已完成的动作对现在造成的影响或结果。特点是既涉及过去,又联系现在:动作是过去发生的,结果是现在存在的。Shehasgone.(她走了。)从这句话中动词所用的现在完成时态可以看出“走”的动作是过去发生的,而对现在所造成的结果是她不在这里了。.(他学过法语。)这句话所说明的结果是他现在懂法语。Look!.(他已经擦过黑板了。)这句话所表示的结果是黑板现在是干净的。现在完成时用法(一)过去的(结束性)动作产生的影响或结果现在还存在。,get,finish,borrow,open,stop,begin,e,die,fall,…,just,yet,ever,before,once(一次),recently等不具体的过去时间或不带有时间状语?I________(do)myhomeworkalready.?He_____________(notfinished)hishomeworkyet.?_______youever______(be)toHaiwaii??We______never______(see)suchanexcitingmatchbefore.?Mother_____just_______(clean)'tcomein.?They_________________(practice)?I_____________(nothear)fromheryet.?_____they_______(be)hererecently?Yes,theyhave.?I___________(be)busyrecently.?---_____yourfatherever______(travel)toNewYork?---No,never.?He__________________(nottravel)'theardHavebeenhavebeenHastravelledhasn'ttravelled注意:当在肯定陈述句中含有already或just时,在转换成否定句或疑问句时,要把句中的already或just去掉,'tseenthefilmnamedKingLionyet.●'tdonemyhomeworkyet.●'tcleanedthehouseyet.●….Since…Howlonghave/hassb…….?:30Ihavehadthisbikeforayear/:,如be,sleep,live,learn,stay,have,keep,work,walk,…,duringthepast2yearssince从句inthepast2years