初中八年級(jí)英語(yǔ)課件unit8 Grammar focus present perfect

Unit8Unit8HaveyoureadTreasureIslandyet?SectionA3Grammarfocus-4cRevisionReadthefollowingsentenceswehaveseen.HaveyoureadLittleWomenyet?你讀過(guò)小婦人這本書嗎？Yes,Ihave./No,Ihaven't.是的，我讀過(guò)。不，我沒(méi)有HasTinareadTreasureIslandyet?Tina讀過(guò)金銀島這本書嗎？Yes,shehas.Shethinksit’sfantastic.是的，她讀過(guò)，她認(rèn)為這本書是極好的。Haveyoudecidedwhichbooktowriteaboutyet?你已經(jīng)決定去寫關(guān)于哪本書了嗎？Yes,Ihave.I’vealreadyfinishedreadingit.Itwasreallygood.是的，我決定了。我已經(jīng)讀完它了，它真的很好。構(gòu)成現(xiàn)在完成時(shí)是由“助動(dòng)詞have/has+動(dòng)詞的過(guò)去分詞”構(gòu)成的，規(guī)則動(dòng)詞的過(guò)去分詞構(gòu)成與過(guò)去式相同，不規(guī)則動(dòng)詞的過(guò)去分詞則需逐個(gè)記憶?，F(xiàn)在完成時(shí)句式1.肯定句：主語(yǔ)+have/has+過(guò)去分詞(+其他)2.否定句：主語(yǔ)+have/has+not+過(guò)去分詞(+其他)3.一般疑問(wèn)句：have/has+主語(yǔ)+過(guò)去分詞(+其他)肯定回答Yes,主語(yǔ)+have/has否定回答No,主語(yǔ)+haven't/has't4.特殊疑問(wèn)句：特殊疑問(wèn)詞(不是句子主語(yǔ))+have/has+主語(yǔ)+過(guò)去分詞(+其他)2)特殊疑問(wèn)詞(是句子主語(yǔ))+have/has+過(guò)去分詞(+其他)用法1.

表示過(guò)去發(fā)生或已經(jīng)完成的某一動(dòng)作對(duì)現(xiàn)在造成的影響或結(jié)果。

e.g.–Haveyouhadyourlunchyet?–Yes,Ihave.I’vejusthadit.(現(xiàn)在我不餓了。)2.表示動(dòng)作或狀態(tài)從過(guò)去某一時(shí)刻開(kāi)始，一直延續(xù)到現(xiàn)在，而且可能還要繼續(xù)下去。如for+時(shí)間段，since+時(shí)間點(diǎn)

（1)I'veknownhimforfiveyears.我認(rèn)識(shí)他5年了。

（2)IhavestudiedEnglishsince2001.從2001年起我就（開(kāi)始）學(xué)英語(yǔ)。（3)表示到現(xiàn)在為止的這段時(shí)間內(nèi)所進(jìn)行的動(dòng)作或工作的積累?！颕havebeentotheUSAforthreetimes.我已經(jīng)去過(guò)美國(guó)三次了?，F(xiàn)在完成時(shí)的標(biāo)志詞時(shí)間狀語(yǔ)already,yet,just,ever,never,before已經(jīng)，迄今，剛剛，曾經(jīng)，從不，之前already和yet都可以作為現(xiàn)在完成時(shí)的標(biāo)志詞，但它們的用法不同?！鬭lready一般用于肯定句中。如：Wehavealreadycleanedupourclassroom.注意：already用于疑問(wèn)句中時(shí)通常表示驚奇。如：Haveyoufinishedyourhomeworkalready?Ican’tbelieveit.◆yet一般用于疑問(wèn)句和否定句中。如：Haveyouseenheryet?Thebushasn’tcomeyet.動(dòng)詞的過(guò)去式的變化和過(guò)去分詞的變化并不完全相同。我們對(duì)它們作了一個(gè)大致的分類。(注：例子中單詞的變化順序?yàn)椋簞?dòng)詞原形→動(dòng)詞的過(guò)去式

→動(dòng)詞的過(guò)去分詞)一、過(guò)去式和過(guò)去分詞的變化相同規(guī)則變化：1.一般在動(dòng)詞詞尾直接加ed。如：pick→picked→picked;wish→wished→wished;stay→stayed→stayed2.以不發(fā)音的e結(jié)尾的動(dòng)詞后面加d。如：like→liked→liked;hope→hoped→hoped;phone→phoned→phoned3.以“輔音字母+y”結(jié)尾的動(dòng)詞，變y為i，再加-ed。如：study→studied→studied;hurry→hurried→hurried;reply→replied→replied4.詞尾只有一個(gè)輔音字母的重讀閉音節(jié)動(dòng)詞，要雙寫輔音字母，再加-ed。如：stop→stopped→stopped;clap→clapped→clapped不規(guī)則變化：5.以不變應(yīng)萬(wàn)變。如：let→let→let;put→put→put;read→read→read6.若中間有雙寫e，則去掉一個(gè)e，單詞末尾再加t。如：feel→felt→felt;keep→kept→kept;sleep→slept→slept7.結(jié)尾的字母d變t。如：lend→lent→lent;build→built→built;send→sent→sent8.變?yōu)橐?ought或-aught結(jié)尾。如：buy→bought→bought;bring→brought→brought;catch→caught→caught;teach→taught→taught活學(xué)活用1.Writetheformsofthepasttenseandpastparticiple:drink____________see____________find____________leave____________tell____________drankdrunksawseenfoundfoundleftlefttoldtold—WhyisMr.Yangstillintheteachers’office?—Maybehe________hisworkyet.A.doesn’tfinishB.hasn’tfinishedC.haven’tfinishedB

Exercises

4aUsethewordsinbracketstocompletetheconversations.1.A:Wouldyoulikesomethingtodrink?B:No,thanks._______________________.(just/drinksometea)2.A:Iheardyoulostyourkey.____________________?(find)B:No,notyet.IhavejustdrunksometeaHaveyoufoundit3.A:DoyouknowwhenTomisleaving?B:________________________.(already/leave)A:When___________________?(leave)B:Thismorning.4.A:Isyoursistergoingtothemovieswithustonight?B:No.__________________________.(already/seethefilm)HehasalreadyleftdidheleaveShehasalreadyseenthefilm5.A:Whatdoyourparentsthinkaboutourplan?B:I__________________.(not/tellthem/yet)haven’ttoldthemyet4bFillintheblankswiththecorrectformsofthewordsinthebrackets.

Sally____(love)reading.Inthemorningshereadsthenewspaperandintheeveningshereadsbooks.She___already____(read)morethan100differentbooks.Herfavoritekindofbooksissciencefiction.Sheisinterestedinscienceandtechnologyandlovestoimaginewhattheworld______(be)likein50years.loveshasreadwillbeShe_______(finish)readingabookaboutrobotslastweekand_________(write)abookreportaboutitnextweekforherFrenchclass.Everytimesheisinthelibrary,Sallylooksatthemanybooksshe__________(notread)yetandshecan’twaittoreadthem.finishedwillwritehasn’treadGroupwork

4cCompletethechartwithinformationaboutyouandyourfriend.A:Whatbookshaveyoualreadyread?B:IhavealreadyreadTomSawyerandHarryPotter.A:Whatdoyouthinkofthem?B:Well,IthinkHarryPotterwasexciting,butTomSawyerwasabitboring.YouYourfriendCommentsBooksIhavealreadyreadMoviesIhavealreadyseenSongsIhavealreadyheard()【2013廣西貴港】—DoyouknowthemovieLostinThailand?—Yes.I______ittwice.It’sfunny.A.sawB.seeC.haveseenD.willseeC中考鏈接()【2013黑龍江牡丹江】—Lunch?—No,thanks.I__________.A.willeatB.ameatingC.haveeaten()【2013湖北黃岡】—WhereisTom?Wecan’tfindhimanywhere.—Perhapshe_____home.A.hascomeB.isgoingC.wentD.wasgoingCA1.—Chinadevelopssofast.—That’strue.It_____alotalready.(2011安徽蕪湖)A.changes B.changed C.willchange D.haschanged2.Juliaisn’tgoingtothecinemawithusbecauseshe______thefilm.(2013浙江湖州)A.sees

B.saw

C.willsee

D.hasseen實(shí)戰(zhàn)中考3.—I’dliketointroducemybestfriendtoyou,Peter.—Thankyou,Lucy.Butwe_______already.(2012河南)A.meet