现在完成时专题

当我第一次到达这个岛时，我什么也没有。但是我现在已经发现了一艘大船并制作了一艘小船。我已经带回了很多我可以使用的东西-食物和喝的、工具、刀和枪。虽然我已经失去了一切，但我没有失去我的生命。因此我将不会放弃，我将等待另一艘船。我已经砍了很多树木并且建了一栋房子。我几乎每天都带着枪出去杀动物和鸟作为食物。我现在甚至在学习种水果和蔬菜。完成时专题现在完成时1.构成：_/_+_2.表示：1）_ I have studied English.2)_ I have worked here for 5 years.have has过去分词过去分词过去的动作对现在的影响过去的动作对现在的影响动作从过去持续到现在动作从过去持续到现在过去分词变型1.规则变化 动词+_ 如：finish-_;work-_ visit-_;clean-_2.不规则变化 书P_edfinishedworkedvisitedcleaned136-137am,is,are-_;come-_do;does-_;go-_have;has-_;make-_find-_;see-_take-_;get-_ beencomedonegonehadmadefoundseentakengot现在完成时的构成1.我已经完成了家庭作业。I _already _my homework.2.我的爸爸已经到家了。My father _already _home.havefinishedhasgot三人称单数：三人称单数：he,she,it 以及可以用以及可以用he,she,it 代替的人或物代替的人或物1.我们已经有很多作业了。We _already _so much homework.2.这只小狗已经吃太多了。The dog _ already _too much.havehadhaseaten现在完成时的否定句1.I have already finished my homework.2.My father has already got home.I havent finished my homework yet.My father hasnt got home yet.否定句和一般疑问句中，否定句和一般疑问句中，already要替换为要替换为yet,yet常放句末常放句末1.My friends have already had lunch.2.Alice has already bought some food.My friends havent had lunch yet.Alice hasnt bought any food yet.现在完成时的一般疑问句1.I have already finished my homework.2.My father has already got home.Have you finished your homework yet?Has your father got home yet?Yes,I have./No,I havent.Yes,he has./No,he hasnt.否定句和一般疑问句中，否定句和一般疑问句中，already要替换为要替换为yet,yet常放句末常放句末1.My friends have already had lunch.2.Alice has already bought some food.Have your friends had lunch yet?Yes,they have./No,they havent.Has Alice bought any food yet?Yes,she has./No,she hasnt.现在完成时标志1.表示动作对现在的影响，标志：already,yet,ever(曾经)，never,just(刚好)，before,once(一次)I have ever been to Beijing.He has just gone out.我曾经去过北京我曾经去过北京.他刚好出去了他刚好出去了现在完成时与过去时的混用1.I _already _my homework.I _it two hours ago.(finish)2.We _ _before.We _each other in 2012.(meet)3.My mother_never _to Shanghai,although my sister _there last year.(be)havefinishedfinishedhave metmethas beenwas判断时态1.Grandpa _just _the flowers.He _them 20 minutes ago.(water)2.I _already _the film.I _it last Saturday.(see)3._you _your work yet?Of course.I _it yesterday.(finish)hasfinishedwateredhaveseensawHavewateredfinished现在完成时标志2.表示动作一直持续到现在。标志：for,since,so far(到目前为止)=by now，in recent years(在最近几年中)；in the past few years(在过去几年中)I have borrowed a book for 5 days.keptI have gone away from Beijing since 2006.beenI have bought 100 books so far.had1.I bough this MP4 player month ago.(改为同义句)I _ _this MP4 player for a month.2.Eric borrowed the book last week.(改为同义句)Eric _ _the book since last week.have hadhaskept现在完成时标志1.表示动作对现在的影响，标志：already,yet,ever(曾经)，never,just(刚好)，before,once(一次)2.表示动作一直持续到现在。标志：for,since,so far(到目前为止)=by now，in recent years(在最近几年中)；in the past few years(在过去几年中)have been to/have gone tohave been to“去过某地”主语去过但已回来，侧重指经历 have gone to”已经去了某地”主语还在那里，或可能在路上，还没回来1.-Where is your father?-_A.He has been to the library.B.He has gone to the library.2.-Have you ever been to America?-Yes.I have _there twice.A.gone B.beenBB