6BU2語法知識點講解I.詞性轉換.flyv.飛，飛行→flightn.航班e.g.Nextmonth,theywillflytotheUSA.TheirFlightNo.isMU6789..departv.離開，出發→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.進入theentrancetosomeplaceII語言點/句型現在完成時現在完成時：sb.have/has+V.p.p（動詞的過去分詞）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 （+時間段）=havelivedin/stayedinhavegoneto去，至U （未回）e.g.IhavebeentoAmericabefore.我以前去過美國。ShehasbeeninLondonfor2years.她已經住在倫敦兩年。WhereisMary?Shehasgonetothelibrary.Mary在哪？她已經去圖書館了。通常與表示時間的副詞already,yet,never,ever，just，before,等連用。already,just“已經”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”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”用在完成時中，放在句末。e.g.Ihaveneverreadthiskindofbooksbefore.Haveyoueverheardsuchatalebefore?for/since,用HoWlong提問用于表示過去已經開始，持續到現在的動作或狀態已經有一段時間。這時表示持續動作或狀態的動詞多是延續性動詞和be.e.g.Ihaven’tseenherforalongtime.Maryhasbeenillforthreedays.Ihavelivedheresince1998.However,theyhavenotpackedtheirsuitcasesyet.however:可用于句首，句中.前后常用“，”隔開。轉折but:用于句中e.g.Shewasill,however,shestillwenttowork.Hisfirstresponsewastosayno.However,hechangedhismind.Shewasill,butshestillwenttowork.leavefor目的地出發去 動身去 leaveA離開A地 e.g.HewillleaveShanghai.leaveforB出發去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、學校等小范圍的地方）e.g.arriveattheairport/school...【近義】getto,reach+地點到達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”，不可數名詞enough修飾名詞時前置，修飾形容詞副詞時后置e.g.enoughmoney,goodenough形容詞+enoughtoomany+可數名詞復數“太多的...”toomuch+不可數名詞“太多的...”buysb.sth.=buysth.forsb.e.g.Grandmahasboughtplentyof