Unit2語法知識點(diǎn)講解牛津上海版英語六年級下冊

6BU2語法知識點(diǎn)講解I.詞性轉(zhuǎn)換.flyv.飛，飛行→flightn.航班e.g.Nextmonth,theywillflytotheUSA.TheirFlightNo.isMU6789..departv.離開，出發(fā)→departuren.離開，啟程e.g.Ourparentswilldeparttomorrowmorning.Thedeparturetimeis9.00a.m..passv.通過一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.進(jìn)入theentrancetosomeplaceII語言點(diǎn)/句型現(xiàn)在完成時(shí)現(xiàn)在完成時(shí)：sb.have/has+V.p.p（動(dòng)詞的過去分詞）Sb.have/hasnotV.p.p.（否定句）Have/Hassb.V.p.p.（一般疑問句）havebeento去過，到過 （已回）havebeenin住在 （+時(shí)間段）=havelivedin/stayedinhavegoneto去，至U （未回）e.g.IhavebeentoAmericabefore.我以前去過美國。ShehasbeeninLondonfor2years.她已經(jīng)住在倫敦兩年。WhereisMary?Shehasgonetothelibrary.Mary在哪？她已經(jīng)去圖書館了。通常與表示時(shí)間的副詞already,yet,never,ever，just，before,等連用。already,just“已經(jīng)”通常用于肯定句中,放在句中。e.g.Ihavealreadyreadthisbook.Ihavejustboughtanovel.yet“仍然，還”用在疑問句和否定句中，放在句末。e.g.Ihaven’treadthisbookyet.Haveyouhadbreakfastyet?ever“曾經(jīng)”通常用于疑問句中,放在句中。e.g.HaveyoueverbeentotheUSA?HasLilyeverbeentoAustralianever“從來不”用在否定句中,放在句中。e.g.Ishefamous?Ihaveneverheardofhim.before“以前”用在完成時(shí)中，放在句末。e.g.Ihaveneverreadthiskindofbooksbefore.Haveyoueverheardsuchatalebefore?for/since,用HoWlong提問用于表示過去已經(jīng)開始，持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)已經(jīng)有一段時(shí)間。這時(shí)表示持續(xù)動(dòng)作或狀態(tài)的動(dòng)詞多是延續(xù)性動(dòng)詞和be.e.g.Ihaven’tseenherforalongtime.Maryhasbeenillforthreedays.Ihavelivedheresince1998.However,theyhavenotpackedtheirsuitcasesyet.however:可用于句首，句中.前后常用“，”隔開。轉(zhuǎn)折but:用于句中e.g.Shewasill,however,shestillwenttowork.Hisfirstresponsewastosayno.However,hechangedhismind.Shewasill,butshestillwenttowork.leavefor目的地出發(fā)去 動(dòng)身去 leaveA離開A地 e.g.HewillleaveShanghai.leaveforB出發(fā)去B地 e.g.HewillleaveforTokyo.leaveAforB離開A地去B地e.g.HewillleaveShanghaiforTokyo.arrive+in大地方（如國家、城市等范圍較大的地方）e.g.arriveinChina/Shanghai…arrive+at小地方（如車站、學(xué)校等小范圍的地方）e.g.arriveattheairport/school...【近義】getto,reach+地點(diǎn)到達(dá)havetodo…不得不做...（否定don'thaveto）e.g.Ihavetosayitagain.我不得不再說一遍。enoughspace足夠的空間enough+名詞space=room“空間”，不可數(shù)名詞enough修飾名詞時(shí)前置，修飾形容詞副詞時(shí)后置e.g.enoughmoney,goodenough形容詞+enoughtoomany+可數(shù)名詞復(fù)數(shù)“太多的...”toomuch+不可數(shù)名詞“太多的...”buysb.sth.=buysth.forsb.e.g.Grandmahasboughtplentyof