Unit8现在完成时态1.现在完成时态的构成：A肯定式主语+助动词have/has+过去分词+其它。这里的have/has是助动词，没有什么具体的意义，当主语是第三人称单数时助动词用has.其余的人称时用have.have/has的缩略形式是’ve,或’s.规则的动词的过去分词的构成和过去式的构成方式是一样的，不规则的动词的过去分词可参看不规则动词表。例如：Wehave/We’vejustcopiedallthenewwords.Shehas/She’slostherbooks.B否定式主语+助动词have/has+not+过去分词+其它。havenot=haven’thasnot=hasn’t.肯定句中有some,already时，改为否定时要分别改为any,yet.有时not可用never代替，表示：从来没有。例如:Ihaven’tfinishedmyhomeworkyet.(我还没有完成我的作业）Shehasn’tspokentoaforeigner.(她还没有和外国人说过话）==Shehasneverspokentoaforeigner.C一般疑问式助动词have/has+主语+过去分词+其它？同时要把句中的somealready改为any和yet.肯定的回答是Yes,主语+have/has.否定的回答是No,主语+haven’t/hasn’t.有时也可用No,notyet/No,never/No.notevenonce.例如：Haveyouevermadedumpings?（你曾经做过饺子吗）Yes,Ihave.No,Ihaven’t.NO,never.现在完成时的用法：1.表示过去发生的或已经完成的某一动作对现在造成的影响和结果。常和时间副词already（已经）。yet(还，已经），just(刚刚）.ever（曾经）.before（以前）.never（从不）.sofar（到目前为止）manytimes（很多次数）.inthelast/pastfewyears/months（在过去的几年或月）例如：1。I’vealreadyreadthebook.我已经读过这本书了2.Shehaswashedherclothesmanytimes.我洗了衣服很多次了2表示从过去某个时间开始的动作或状态一直持续到现在，常和for.since引导的时间状语从句连用。注意for+时间段。Since+时间点（从句中常用一般过去式）例如;IhaveleanedEnglishfor5years.==IhaveleanedEnglishsince5yearsago.Shehaslivedheresinceshewasborn.用所给的词的适当的形式填空:1.I-------already------(see)thefilm.I----(see)itlastweek.2.-----he------(finish)hiswork?Notyet.3.Myfather----just----(come)backfromwork.Heistirednow.4.SofarI-----(make)quiteafewfriendshere.5.Ourcountry-----(change)alotinthelastfewyears.6.Hisbrother------(be)inthehospitalforthreeyears.7.LiTao----(know)me）here。sinceI----(come8。They---(notcut)thewoodyet.9.Haveyou-----(do)yourhomeworkyet?Yes,I------(do)itanhourago.10.WhereisMissWu?She-----(go)toEnglandonbusiness.单项选择1.Hewillbeback----twoweeks.A.inB.forC.sinceD.After2.Haveyoureadthesebooks?Yes,I-----(read)itthreedaysago.A.HavereadB.readChavedoneDdid3.Ihaven’twateredtheplants------.Ihavetodoitinaminute.A.alreadyB.yetC.justD.Ever4.Haveyouwateredtheflowerstoday?Not---.I’msorry.A.AlreadyB.yetC.stillD.either5.Haveyour--metMr.Li?A.beforeBjustCagoDamomentago6.HarryPotterisaverynicefilm.I--ittwice.AwillBhaveseencsawDsee7.-----you---yourithomework?Yes,I---itamomentago.8.ADid,do,finishedBHave,done,finishedCHave,done,havefinishedDwill,do,finish9.Inthelasttwoyears,they---threemajorconcerts.A.havemadeBmadeChadhadD.have10.He---todrawhorsesalready.When--hestarttolearn?Lastyear.A.learned,hasB.learned,didC.haslearned,hasD.haslearned,did11.Ihaveneverbeentoawaterpark.--------I.AeB.NeitherhaveCSohaveDSoam.Sohav句型转换：1.Hehasneverswam,-------(改成反意疑问句）2.HermotherhasbeenaPartymemberforthreeyears(同义句）Hermother---thePartymemberthreeyears----3.Iboughtanewbikejustnow(用just改写）I------just----anewbike.4.She’salreadygonetoAmerica(改为否定句）She---------toAmerica.5.TheyhaveeverbeentoanEnglish-speakingcountry.(改为一般疑问句）-----theyever------toanEnglish-speakingcountry?6.Shehasbeenaflightattendantfortwoyears.(划线部分提问）------------------she-----aflig...
