Unit2语法知识点讲解牛津上海版英语六年级下册

6BU2语法知识点讲解I.词性转换.flyv.飞，飞行→flightn.航班e.g.Nextmonth,theywillflytotheUSA.TheirFlightNo.isMU6789..departv.离开，出发→departuren.离开，启程e.g.Ourparentswilldeparttomorrowmorning.Thedeparturetimeis9.00a.m..passv.通过一passengern.乘客；旅客e.g.Youcan’tpass.Stop,please!Allpassengersmustobeytherules.e.g.Thearrivaltimeis3.00p.m.,Sotheywon'tarriveat1.00p.m.entrancen.入口→enterv.进入theentrancetosomeplaceII语言点/句型现在完成时现在完成时：sb.have/has+V.p.p（动词的过去分词）Sb.have/hasnotV.p.p.（否定句）Have/Hassb.V.p.p.（一般疑问句）havebeento去过，到过 （已回）havebeenin住在 （+时间段）=havelivedin/stayedinhavegoneto去，至U （未回）e.g.IhavebeentoAmericabefore.我以前去过美国。ShehasbeeninLondonfor2years.她已经住在伦敦两年。WhereisMary?Shehasgonetothelibrary.Mary在哪？她已经去图书馆了。通常与表示时间的副词already,yet,never,ever，just，before,等连用。already,just“已经”通常用于肯定句中,放在句中。e.g.Ihavealreadyreadthisbook.Ihavejustboughtanovel.yet“仍然，还”用在疑问句和否定句中，放在句末。e.g.Ihaven’treadthisbookyet.Haveyouhadbreakfastyet?ever“曾经”通常用于疑问句中,放在句中。e.g.HaveyoueverbeentotheUSA?HasLilyeverbeentoAustralianever“从来不”用在否定句中,放在句中。e.g.Ishefamous?Ihaveneverheardofhim.before“以前”用在完成时中，放在句末。e.g.Ihaveneverreadthiskindofbooksbefore.Haveyoueverheardsuchatalebefore?for/since,用HoWlong提问用于表示过去已经开始，持续到现在的动作或状态已经有一段时间。这时表示持续动作或状态的动词多是延续性动词和be.e.g.Ihaven’tseenherforalongtime.Maryhasbeenillforthreedays.Ihavelivedheresince1998.However,theyhavenotpackedtheirsuitcasesyet.however:可用于句首，句中.前后常用“，”隔开。转折but:用于句中e.g.Shewasill,however,shestillwenttowork.Hisfirstresponsewastosayno.However,hechangedhismind.Shewasill,butshestillwenttowork.leavefor目的地出发去 动身去 leaveA离开A地 e.g.HewillleaveShanghai.leaveforB出发去B地 e.g.HewillleaveforTokyo.leaveAforB离开A地去B地e.g.HewillleaveShanghaiforTokyo.arrive+in大地方（如国家、城市等范围较大的地方）e.g.arriveinChina/Shanghai…arrive+at小地方（如车站、学校等小范围的地方）e.g.arriveattheairport/school...【近义】getto,reach+地点到达havetodo…不得不做...（否定don'thaveto）e.g.Ihavetosayitagain.我不得不再说一遍。enoughspace足够的空间enough+名词space=room“空间”，不可数名词enough修饰名词时前置，修饰形容词副词时后置e.g.enoughmoney,goodenough形容词+enoughtoomany+可数名词复数“太多的...”toomuch+不可数名词“太多的...”buysb.sth.=buysth.forsb.e.g.Grandmahasboughtplentyof