unit3 unit3onlinetours grammar 1 tounderstandthedifferencesbetweenthesimplepasttenseandthepresentperfecttense 2 tograsptheexpressionswiththepresentperfecttense 3 tograsptheexpressionswiththesimplepasttense 4 tounderstanddifferentusesofthepresentperfecttense learningtargets 完成句子 1 北京因萬里長城而著名 beijing thegreatwall 2 這條河是個釣魚的好地方 thisriverisa fishing 3 我三天前聽說過這件事 i this 4 自從2000年起 他就在上海工作了 he inshanghai 2000 isfamousfor goodplacetogo heardofthreedaysago hasworkedsince dreamvi vt 做夢 夢想dreamabout of想象 夢想e g doyouoftendreamatnight 你在夜里經(jīng)常做夢嗎 isometimesdreamaboutmyparents 我有時夢見我的父母 idreamofbecomingateacher 我一心想當個教師 newwords passportn 護照 daniel兩年前去了北京 danielwenttobeijingtwoyearsago daniel已經(jīng)在北京居住兩年了 danielhaslivedinbeijingfortwoyears weusesimplepasttensetotellwhathappenedinthepast weusethepresentperfecttensetotalkaboutanactionthatstartedinthepastandcontinuestothepresent presentation 1 三年前他養(yǎng)了只貓做寵物 he acataspetthreeyearsago 2 這只寵物貓他養(yǎng)了三年了 he thepetcatforthreeyears kept haskept exercises daniel上個月買了臺新電腦 danielboughtanewcomputerlastmonth daniel已經(jīng)買了臺新電腦 danielhasboughtanewcomputer danielhasanewcomputernow weusethesimplepasttensetotellwhathappenedinthepast weusethepresentperfecttensetotalkabouttheresultofanaction whentheactionhappenedisnotveryimportant itmayhavejusthappenedorhappenedsometimeago presentation 1 我上個星期去參觀了那個新動物園 i thatnewzoolastweek 2 我已經(jīng)參觀過那個新動物園了 i thatnewzoo visited havevisited exercises 吳老師2010年和2011年訪問過加拿大 mrwuvisitedcanadain2010and2011 吳老師已經(jīng)去過加拿大兩次 mrwuhasbeentocanadatwice weusethesimplepasttensetotellwhathappenedinthepast weusethepresentperfecttensetotellhowmanytimesanactionhashappenedtillnow presentation 1 我上周看過這部電影 i thismovielastweek 2 我已經(jīng)看過這部電影很多次 i thismoviemanytimes saw haveseen exercises simonisshowingmilliesomepictures completehissentenceswiththecorrectformsofthewordsinbrackets i visit thepalacemuseumwithmygrandparentstheotherday i climb mounthuanglastsummer visited climbed youever try thefamoustianjinbaozi iamhappythati learn toswim havetried havelearnt mrwuisaskingthestudentstomakesentenceswiththecorrecttenses helpthemcompletethesentenceswiththecorrectformsofthewordsinbrackets 1 i finish just myhomework millie finish herhomework20minutesago 2 i write anemailtomyfriendyesterday daniel write already twoemails hasalreadywritten havejustfinished wrote finished 3 i be inhainanlastweek someofourclassmates notbe tohainanyet 4 i live insunshinetownsinceiwasborn daniel live innanjingin2007 was lived havelived havennotbeen milliehasneverbeentonanjing sheisaskingsimonaboutthecity completetheirconversationwiththecorrectformsofthewordsinbrackets millie you be ever tonanjing simon yes i 2 be therethreetimes millie when 3 you go therelast simon lastsummer i 4 spend aweekthere millie 5 you like it haveyoueverbeen havebeen didyougo spent doyoulike simon ohyes i 6 have agreattimethere i 7 visit manyplacesofinterestand 8 eat lotsoflocalfood millie luckyyou i 9 be never there had visited ate haveneverbeen millieiswritingabouttheusainherdiary completeherdiaryentrywiththecorrectformsoftheverbsinthebox saturday 15marchhaveyoueverdreamtoftravellingaroundtheworldwithoutapassport yes youcanrealizeyourdreambytakinganonlinetour yesterdaydanniel 1 meanonlinetouroftheusa i 2 never somanywonderfulpictruesbefore showed haveseen lastweek i 3 abookabouttheplacesofinterestintheusa i 4 20pagesalready it sreallyinteresting mydad 5 just fromtheusa buti 6 never there ihopeicanvisittheusasomeday havebeen bought haveread has returned weoftenusethesetimeexpressionswiththesimplepasttense yesterday thedaybeforeyesterdaytheotherdayjustnow inthepastlast agoin 過去的年份 weoftenusethesetimeexpressionswiththepresentperfecttense alreadyuptonoweveruntil tillnowjustsofarrecently not yetsinceforinthepastyears tips someday和theotherday的區(qū)別 someday指將來 總有一天 有朝一日 終將 日后 某一天 謂語動詞用一般將來時 如 yourwisheswillcometruesomeday 總有一天你的愿望會實現(xiàn)的 somedayyou llhavetopayforwhatyouhavedone 總有一天你要為你的行為而付出代價的 tips someday和theotherday的區(qū)別 theotherday相當于afewdaysago 意為 幾天前 某天 那天 不久前 句中用一般過去時 如 imetherinthestreettheotherday 幾天前我在街上碰見過她 iboughtthewatchtheotherday 這手表我是幾天前買的 1 一般過去時表示過去某時發(fā)生的動作或單純敘述過去的事情 強調(diào)動作 現(xiàn)在完成時為過去發(fā)生的 強調(diào)過去的事情對現(xiàn)在的影響 強調(diào)的是影響 summary 2 一般過去時常與具體的時間狀語連用 而現(xiàn)在完成時通常與模糊的時間狀語連用 或無時間狀語 一般過去時的時間狀語 yesterday lastweek ago in1980 inoctober just now等 皆為具體的時間狀語 現(xiàn)在完成時的時間狀語 for since sofar ever never just yet till until uptonow inpastyears always等 皆不確定的時間狀語 共同的時間狀語 thismorning tonight thisapril now already recently lately等 3 現(xiàn)在完成時可表示持續(xù)到現(xiàn)在的動作或狀態(tài) 動詞一般是延續(xù)性的 如 live teach learn work study know 一般過去時常用的非持續(xù)