Unit1單元語(yǔ)法精講精練●單元語(yǔ)法精講●現(xiàn)在完成時(shí)(1)現(xiàn)在完成時(shí)表示過(guò)去發(fā)生或已經(jīng)完成的動(dòng)作對(duì)現(xiàn)在造成的影響或結(jié)果,也可表示過(guò)去已經(jīng)開(kāi)始,一直持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)。由“have/has+動(dòng)詞的過(guò)去分詞”構(gòu)成。1.過(guò)去分詞的構(gòu)成動(dòng)詞的過(guò)去分詞的構(gòu)成:規(guī)則變化跟動(dòng)詞的過(guò)去式一樣,不規(guī)則變化見(jiàn)課本后面的附表。2.現(xiàn)在完成時(shí)的幾種句型結(jié)構(gòu)(1)否定句:主語(yǔ)+haven’t/hasn’t+動(dòng)詞的過(guò)去分詞+其他。Hehasn’tseenthisfilm.他沒(méi)看過(guò)這部電影。(2)一般疑問(wèn)句:Have/Has+主語(yǔ)+動(dòng)詞的過(guò)去分詞+其他?Haveyoucleanedtheclassroom?你打掃教室了嗎?(3)特殊疑問(wèn)句:疑問(wèn)詞+have/has+(主語(yǔ)+)動(dòng)詞的過(guò)去分詞+其他?Wherehashegone?他去哪兒了?3.現(xiàn)在完成時(shí)的用法(1)表示一個(gè)動(dòng)作在過(guò)去某時(shí)開(kāi)始,到說(shuō)話時(shí)剛剛結(jié)束,常和yet,already,just等副詞連用。Haveyoufinishedyourhomework?你做完作業(yè)了嗎?Hasshefoundherpenyet?她已經(jīng)找到她的鋼筆了嗎?Thechildren’sparentshavejustebackfromwork.孩子們的父母剛下班回來(lái)?！咀⒁狻縜lready和yet都是副詞。通常情況下,already用于肯定句中,意為“已經(jīng)”,變否定句或疑問(wèn)句時(shí)要把a(bǔ)lready變?yōu)閥et;yet通常用于否定句的句末,表示“仍然;還”,還可用于疑問(wèn)句的句末,表示“已經(jīng)”。Motherhasalreadypreparedsupper.媽媽已經(jīng)準(zhǔn)備好晚餐了。Lilyhasn’tebackyet.莉莉還沒(méi)有回來(lái)。Haven’tyougotreadyyet?你還沒(méi)準(zhǔn)備好嗎?(2)表示過(guò)去動(dòng)作的結(jié)果現(xiàn)在仍然存在,一般不與時(shí)間狀語(yǔ)連用。Chinahasalreadymadegreatprogressinscienceandtechnology.中國(guó)在科技方面已經(jīng)取得了巨大進(jìn)步。Shehasbeenagreatpianist.她已經(jīng)成為一位偉大的鋼琴家?！駟卧Z(yǔ)法精練●習(xí)題一：用所給動(dòng)詞的現(xiàn)在完成時(shí)形式填空1.I__________(finish)myhomeworkalready.2.She__________(notsee)thatmovieyet.3.__________you__________(visit)Beijingbefore?4.They__________(justarrive)atthestation.5.He__________(live)heresincehewasachild.6.We__________(notreceive)anylettersfromhimrecently.7.__________Tom__________(eat)hislunchyet?8.Myparents__________(be)toLondontwice.9.Thetrain__________(alreadyleave).10.I__________(notfind)mykeys.Canyouhelpme?習(xí)題二：選擇題()1.He______thisbookyet.A.hasn'treadB.haven'treadC.doesn'tread()2.______you______yourroom?A.Have;cleanedB.Has;cleanedC.Do;clean()3.Shehas______finishedherwork.A.yetB.neverC.already()4.Theyhaven'teback______.A.alreadyB.justC.yet()5.Howlong______you______here?A.have;livedB.has;livedC.do;live()6.Ihave______beentoParis,butI'dliketogo.A.alreadyB.justC.never()7.Mybrother______anewjob.A.hasfoundB.havefoundC.finds()8.We______thatmuseummanytimes.A.havevisitedB.hasvisitedC.visited()9.______hereturnedthebookstothelibrary?A.HasB.HaveC.Did()10.They______just______thenews.A.have;heardB.has;heardC.do;hear習(xí)題三：改寫(xiě)句子（改為否定句或一般疑問(wèn)句）1.Hehasseenthisfilm.(改為否定句)2.Theyhavefinishedtheirproject.(改為一般疑問(wèn)句)3.Shehasalreadyhadlunch.(改為否定句)4.Youhavebeentothenewpark.(改為一般疑問(wèn)句)5.Ihavetoldhimthetruth.(改為否定句)6.Thestudentshavecleanedtheclassroom.(改為一般疑問(wèn)句)7.Mysisterhasboughtanewdress.(改為否定句)8.WehavevisitedtheGreatWall.(改為一般疑問(wèn)句)9.Ithasstoppedraining.(改為否定句)10.Mr.Wanghasworkedherefortenyears.(改為一般疑問(wèn)句)習(xí)題四：改正句中的錯(cuò)誤1.Shehavealreadydoneherhomework.2.Ihaslivedinthiscityforfiveyears.3.Haveyousawthatmovie?4.Theyhaven'tfinishtheworkyet.5.Hehasjustleavetheoffice.6.Wehasvisitedthemuseumtwice.7.Hassheeatsbreakfastyet?8.Myparentshavebuyanewcar.9.Thetrainhavealreadyarrived.10.Havetheyfoundtheirlostdogyet?習(xí)題五：用already或yet填空1.Ihave__________finishedmyreport.2.Hasthemaile__________?3.Theyhaven'tdecided__________.4.Wehave__________seenthatfilm.5.Haveyoudoneyourhomework__________?6.Shehasn'tcalledme__________.7.Hehas__________leftforschool.8.Havetheyarrived__________?9.Ihaven'thadbreakfast__________.10.Thechildrenhave__________gonetobed.習(xí)題六：對(duì)劃線部分提問(wèn)1.Hehasbrokenthewindow.2.Shehasboughtanewdictionary.3.Theyhavelivedherefortenyears.4.Myfatherhasgonetothesupermarket.5.IhavevisitedBeijingtwice.6.Shehasbeenlatethreetimesthismonth.7.Thestudentshavecleanedtheclassroom.8.Wehavewaitedsince2o'clock.9.Hehasfinishedhishomework.10.Theyhavemovedtoanewhouse.

答案習(xí)題一：1.havefinished2.hasn'tseen3.Have,visited4.havejustarrived5.haslived6.haven'treceived7.Has,eaten8.havebeen9.hasalreadyleft10.haven'tfound習(xí)題二：1.A2.A3.C4.C5.A6.C7.A8.A9.A10.A習(xí)題三：1.Hehasn'tseenthisfilm.2.Havetheyfinishedtheirproject?3.Shehasn'thadlunchyet.4.Haveyoubeentothenewpark?5.Ihaven'ttoldhimthetruth.6.Havethestudentscleanedtheclassroom?7.Mysisterhasn'tboughtanewdress.8.HaveyouvisitedtheGreatWall?9.Ithasn'tstoppedraining.10.HasMr.Wangworkedherefortenyears?習(xí)題四：1.have→has2.has→have3.saw→seen4.finish→finished5.leave→left6.has→have7.eats→eaten8.buy→bought9.have→has10.正確習(xí)題五：1.already2.yet3.yet4.already5.yet6.yet7.already8.yet9.yet10.already習(xí)題六：1.Whohasbrokenthewindow?2.Whathasshebought?3.H