新概念英语一册83-84课讲义新概念英语一册Lesson83-84课堂讲义PartI课堂重点一复习现在完成时的句型转换练习1Shehasalreadyhadaholiday.2Ihavedonemyhomework.3LilyhasmetTomtoday.4TheyhavegonetoFrance.5Susanhasheardthenews.6IhavestayedinHarbinfor7years.完成时使用时的注意事项1.现在完成时不能单独与准确过去时间连用如yesterday(morning、afternoon),last(morning、afternoon),twodaysago等2.现在完成时往往同表示不确定的过去时间状语连用如before,recently,lately等Ihaven'tseenmuchofhimrecently(lately).Wehaveseenthatfilmbefore.3.现在完成时常常与某些频率副词及普通副词连用,如ever,never,twice,already（肯定）,yet（否定，疑问）,just,等:HaveyoueverbeentoBeijing?Ihaveneverheardthatnews.Ihaveusedthispenonlythreetimes.Hehasalreadyboughtthathouse.Havetheyfoundthemissingchildyet?4.现在完成时还往往可以同包括现在时间在内的时间状语连用,如now,uptothesefewdays/weeks/months/years,thisweek/month/year,sofar等:Peterhaswrittensixbookssofar.二重点词汇1neveradv.决不；从来没有Heneverbreakshiswords.他从不食言。IhaveneverbeentoItaly.我从来没没去过意大利。Nevertoooldtolearn.活到老，学到老。2everadv.曾经；永远HaveyoueverbeentoBeijing?你曾经去过北京吗？三语法Grammar现在完成时的"未完成用法"现在完成时的"未完成用法"指的是动作开始于过去某一时刻，一直延续到现在，且可能还要继续下去。用行为动词或状态动词（be动词）表示常与for（+时间段）,since（+时间点或过去时的句子）连用.Maryhasbeenillforthreedays.Ihavelivedheresince1998.注（超重要）：瞬间动词（buy,die,join,lose……）不能直接与for，since连用。要改变动词。1.have代替buyMybrotherhashad(不能用hasbought)thisbikeforalmostfouryears.2、用keep或have代替borrowIhavekept(不能用haveborrowed)thebookforafewdays.3、用be替代becomeHowlonghasyoursisterbeenateacher?4、用haveacold代替catchacoldTomhashadacoldsincethedaybeforeyesterday.常用瞬间动词变延续性动词表buy---havebegin/start---beonborrow/lend---keepleave/go---beawayend/finish---beoveropen---beopenclose---becloseddie---bedeadcome/arrive/get/reach/move---bein/atcatchacold---haveacoldjoininthearmy---beinthearmy/beasoldierfallasleep---beasleep