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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,sin
2、ce连用.1.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.Havetheyfoundthemissi
3、ngchildyet?2.现在完成时常常与表示频度的时间状语连用,.专业学习资料.........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. 1.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
4、few days/weeks/months/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
5、作可以持续一段时间或更长时间。 常见的study, play, do, read, learn, drive, write, clean , sleep, speak, talk, wait, fly, stay, sit, stand, lie, keep等。 .专业学习资料.........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,
6、become, buy, borrow, lend, happen, 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
7、 Has your brother been away 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、fin
