高中英语：unit 1 Tales of the unexplainedgrammar课件新人教版必修1.ppt

1 presentperfecttense 2 presentperfectcontinuoustense m2u1grammar usage 现在完成时1 现在完成时的构成2 现在完成时的用法 现在完成进行时1 现在完成进行时的构成2 现在完成进行时的用法 现在完成时和现在完成进行时的比较 现在完成时和现在完成进行时的基本用法 1 现在完成时的构成 主动式 have hasdone被动式 have hasbeendone 1 现在完成时 we alreadyopen thewindow 过去的动作 weopenedthewindow 对现在的影响 thewindowisopen havealreadyopened 2 现在完成时的用法 theboysaretired they justplay aballgame 过去的动作 theboysplayedaballgame 对现在的影响 theboysaretired havejustplayed 现在完成时表示过去发生或已完成的动作 或某一动作对现在造成的影响或结果 通常与表示包括现在在内的时间副词just already before yet never ever lately recently等状语连用 小结 现在完成时用法1 已完成 影响性用法 already 用于肯定句 yet 用于否定和疑问句 daniel live inbeijingsincehecametochina haslived came 现在完成时表示过去已经开始 持续到现在 也许还会持续下去的动作或状态 可以和表示从过去某一时刻延续到现在 包括现在在内 的一段时间的状语连用 如 for和since sofar uptonow today until till thisweek month year during over inthepastfewyears weeks months 现在完成时用法2 未完成用法 小结 fillintheblanks a shehaslearntenglish3years b shehaslearntenglish3yearsago c theyhavelivedhere 1990 for since since i see hersofar what happen totheusainthepast35years haven tseen hashappened since的补充用法a 主句 since 从句greatchangeshavetakenplacesinceyouleft b itis 时间段 since 从句itis hasbeentwoyearssinceileftmyhometown b itwas hadbeentwoyearssinceihadleftmyhometown c itisyearssinceismoked d itisyearssinceibegantosmoke iwenttoegyptin1986 iwenttoegyptin2004 i be toegypttwice havebeen 现在完成时可过去发生过一次或多次的情况 也可以说是一种经历 现在完成时用法3 经验性用法 i notsee anythingsobeautifulinmylife haven tseen 小结 1 hehascomehere 2 hehascomeherefor3days 3 hehasn tcomeherefor3days 4 hehasstayedherefor3days 5 hehasbeenawayfor3days 现在完成时知识扩展一 与现在完成时有关的句型 1 this that it isthefirst second time that clausethisisthefirsttimethati see pandas2 this that it istheonlytime that clauseitistheonlytimethati travel abroad 3 this that it isthebest finest mostinteresting that clause itisthemostdeliciousfoodthati taste haveseen havetraveled havetasted 现在完成时知识扩展二 presentperfectcontinuoustense unit1grammar usage theboystartedhavingdinnerfiveminutesago heisstillhavingdinnernow theboy have dinnersincefiveminutesago hasbeenhaving 1 现在完成进行时 themanstartedworkinginthefieldhalfanhourago heisstillworkingnow theman work inthefieldforhalfanhour hasbeenworking 现在完成进行时的构成 have hasbeendoing 现在完成进行时用法1现在完成进行时表示过去的动作持续到现在并有可能持续下去 cctvhasbeenbroadcastingenglishprogramssince1984 broadcasted broadcast broadcast 小结 现在完成进行时用法2 现在完成进行时表示过去的动作持续到说话时刚结束 mavisstartedwaiting kellyarrives kelly sorryi mlate haveyoubeenwaitinglong mavis yes i vebeenwaitingforanhour wait 小结 3 现在完成时和现在完成进行时的比较 tom read abookaboutstonehenge shefinishedreadingthebook tom read abookaboutstonehenge sheisstillreadingthebook hasread hasbeenreading 比较一 did did 1 2 i travel tobeijingthreetimes i travel inbeijingfor3days havetravelled 比较二 havebeentravelling haveyoubeenswimminginthelake haveyouswuminthelake a howlong b howmanytimes 比较三 a b 1 shehashadthepenfor2years 2 shehaswrittenmanycompositionswiththispen 3 shehasbeenwritingcompositionswiththispen stateverb actionverb actionverb 比较四 1 ihaven