before用法小結(jié)主講

before用法小結(jié)主講before用法小結(jié)Before用作連詞，其基本詞義是“在---之前”，用來表示時間或順序。如：Turnthelightoffbeforeyousleep.睡前先把燈熄掉Thinkbeforeyouspeak.說話之前應(yīng)先想清楚但在不同的語境中before有不同的翻譯Before表示“不等---就---/尚未---就---”⑴.---whydidn’tyoutellhimaboutthemeeting?---Herushedoutoftheroom___Icouldsayaword.(我還沒來得及說他就沖出了房間)

A.beforeB.untilC.whenD.afterbefore⑵.____Icouldgetinaword,hehadmeasuredme.我還沒來得及插上話，他就給我量好了尺寸A.AfterB.WhenC.sinceD.before⑶.Thephonestoppedringing____IAnsweredit.(我還沒來得及接，就掛斷了)A.untilB.whileC.beforeD.after2.Before表示“不知不覺，還沒弄清就---”此意常用于beforesb.know/realise---⑴TimepassedquicklyandthreemonthswentbybeforeIknewit.(時間飛快流逝，不知不覺3個月過去了)⑵SeveralweekshadgonebybeforeIrealisedit.(不知不覺幾個周就過去了)3.Before表示“以免，不然，趁---還沒”It’scloudy.TakeanumbrellabeforeYouregretit.(帶把傘吧以免后悔)I’llcallhimbeforeIforget.(趁著還沒忘記我就給他打個)Putthatawaybeforeitgetsbroken.(把它收好，以免砸了)4.Before用于這兩個句型：Itwas/wasn’t+一段時間+before從句（過了多久/沒過多久才---）Itwill/won’t+一段時間+before從句（還得過多久/用不了多久就---）Itwasalongtimebeforewemetagain.過了很久我們才再次見面區(qū)別：Itis+一段時間+since從句Itwasn’t3yearsbeforewemetagain.(沒過3年我們就又見面了)Itwillbetwoyearsbeforewemeetagain.(還要過兩年我們才能見面)Itwon’tbelongbeforeyouregret.（用不了多久你就會后悔）Wedidn’twaitlongbeforehecameback.(我們沒等多久他就回來了)5.Before表示“寧可---而不愿---”I’ddiebeforeIapologizedtothem.(我寧死也不向他們道歉)Theywouldfighttodeathbeforetheysurrendered.(他們寧死也不投降)Wewilldiebeforewegivein.(我們寧死不屈)鞏固性練習(xí)1.Ascientistmustpractisealot___hecanusealldatatoolswell.A.assoonasB.whenC.untilD.before2.___sherealizedwhatwashappening,shewashitoverthehead.A.WhenB.beforeC.sinceD.asBD3.–whydidn’tyouhelpthelittleboy?--Oh,sorry.Hehadstruggledtohisfeet_____Iranover.A.untilB.afterC.beforeD.since4.Hemadeamistake,butthenhecorrectedthesituation___itgotworse.A.untilB.whenC.beforeD.asCC5.Scientistssayitmaybe5years___itispossibletotestthismedicineonhumanpatients.A.SinceB.afterC.beforeD.when6.Someonecalledmeupinthemiddleofthenight,buttheyhungup_____Icouldanswerthephone.A.asB.sinceC.whileD.beforeCD7.You’dbettergiveitup___itistoolateasit’sverydangerous.A.beforeB.asC.whenD.since8.Itwouldbemonths___hewasfitforwork.A.untilB.sinceC.beforeD.afterAC9.Itwasevening___wereachedthelittletownofWinchester.A.thatB.untilC.sinceD.bef