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1、完成时专项练习一完成时态结构1.肯定句：主语+have/has+动词的过去分词+其他2.否定句：主语+have/has+not+动词的过去分词+其他3.一般疑问句：have/has+主语+动词的过去分词+其他Yes,主语+have/has.No,主语+have/has+not4.特殊疑问句：特殊疑问词+have/has+主语+动词的过去分词+其他二常和现在完成时一起连用的时间状语注意:.现在完成时不能单独与准确时间连用，(如表示过去的时间状语）如yesterday(morning、afternoon),last(morning、afternoon)等，除非与for,since连用.1
2、.现在完成时往往同表示不确定的过去时间状语连用如already（肯定）,yet（否定，疑问）,just,before,recently,still,lately，Just,already,yet,ever,never,before,twice(重复性时间)，for+短时间，since+点时间，sofar,howlong提问的疑问句中.......Hehasalreadyobtainedascholarship.Ihaven'tseenmuchofhimrecently(lately).Wehaveseenthatfilmbefore.Havetheyfoundthemissingch
3、ildyet?2.现在完成时常常与表示频度的时间状语连用,如ever,never,twice,severaltimes等:HaveyoueverbeentoBeijingIhaveneverheardBunnysayanythingagainsther.I have used this pen only three times. It is still good. George has met that gentleman several times. 3.现在完成时还往往可以同包括现在时间在内的时间状语连用, 如up to these few days/weeks/mon
4、ths/years, just, up to present(now), so far等: Peter has written six papers so far. Up to the present everything has been successful. 三完成时的时间状语 当现在完成时与表示短时间的时间状语连用时，谓语动词必须使用延续性动词。如果谓语动词是非延续性动词则转化为对应的延续性动词。 若不是和短时间连用，则不用转化。 英语的行为动词有持续性动词和瞬间性动词之分，使用中应注意两者的区别。 1.持续性动词: 表示一个动作可以持续一段时间或更长时间。
5、常见的study, play, do, read, learn, drive, write, clean , sleep, speak, talk, wait, fly, stay, sit, stand, lie, keep等。 2. 瞬间性动词: 表示一个动作发生在一瞬间，非常短暂。亦称终止性动词。常见的-begin, start, finish, go, come, leave, find, get up, arrive, reach, get to, enter, hear, stop, open, close, become, buy, borrow, lend, hap
6、pen, join, lose, renew, die, take away, put up, set out, put on, get on/off等 3. 瞬间性动词在完成时中如要与表示持续一段时间的状语连用，通常用意思相当的持续性动词来替换 He has been in the army/a soldier for three years. （他参军已有3年了。）不用has joined She has been up for quite some time. （她起床已有好久了。）不用has got up Has your brother been aw
7、ay from home for a long time? （离家已有好久了吗？）不用has left 常用瞬间动词相应持续性动词关系：1、go—beaway2、come—behere3、comeback—beback4、leave—beaway（benothere）5、buy—have6、borrow—keep7、die——bedead8、begin——beon9、finish—beover10、open——beopen11、close——beclo
