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1、-必修二Unit3课文内容1.IdevelopedveryslowlyandittooknearlytwohundredyearsbeforeIwasbuiltasananalyticalmachinebyCharlesBabbage.本句是由并列连词and连接的并列句。and后的句子中before引导时间状语从句。△before引导时间状语从句before引导时间状语从句时可以根据语境译作“过了,,（时间）才,,”，“还没来得及,,就,,”或“在,,之前”。△before常用于以下句型中：⑴Itwas+时间段+befor
2、e...“过了,,才,,”，从句常用一般过去时。⑵Itwasnotlongbefore...“不久就,,”，从句常用一般过去时。⑶Itwillnotbelongbefore...“不久就会,,”，从句常用一般现在时。⑷Itwillbe+时间段+before...“要过,,才,,”，从句常用一般现在时。Itwasfivedaysbeforehecameback.Itwasnotlongbeforehesensedthedangeroftheposition.Itwillnotbelongbeforetheyunderstan
3、deachother.Itwillbehalfayearbeforeyougraduatefromtheschool.练习：1.Itwasevening______wereachedthelittletownofWinchester.A.thatB.untilC.sinceD.before2.Scientistssayitmaybefiveorsixyears______itispossibletotestthismedicineonhumanpatients.3.Someonecalledmeupinthemiddleo
4、fthenight,buttheyhungup______Icouldanswerthephone.A.asB.sinceC.untilD.before4.Hemadeamistake,butthenhecorrectedthesituation______itgotworse.A.untilB.whenC.beforeD.as5.Itwassometime_____werealizedthetruth.A.whenB.untilC.sinceD.before6.TheAmericanCivilWarlastedfoury
5、ears_____theNorthwonintheend.A.afterB.beforeC.whenD.then7.–Whydidn’tyoutellhimaboutthemeeting?–Herushedoutoftheroom_____Icouldsayaword.8.–Howlongdoyouthinkitwillbe______Chinasendsamannedspaceshiptothemoon?–Perhapstwoorthreeyears.2.Anyhow,mygoalistoprovidehumanswit
6、halifeofhighquality.本句为简单句。mygoal为主语；动词不定式短语toprovide...为表语；ofhighquality作定语，修饰alife.△“of+名词”结构“of+名词”结构可在句中作表语、定语和补语。该结构可分为两类：----⑴名词有相应的形容词时，“of+名词”可转化为相应的形容词。这类名词有value,use,----important,help,interest,benefit等。它们可用no,some,any,little,much,greatTheyareofgreath
7、elp(=veryhelpful)toEnglishlearners.等词修饰。----Infact,sportscanbeofgreatbenefit(=verybeneficial)toourhealth.----⑵名次没有相应的形容词时，“of+名词”没有相应的形容词形式。常见的名词有age,size,color,weight,quality,height,price,opinion,shape,kind,way等，这些名词前的限定词常为a,an,thesame等。Mr.Smith,myteacher,isofth
8、esameopinion.Weareofthesameage.Tomisofadifferentwayofthinking.----练习：⑴–ThisbookbyTonyGarrisionis______forourcourse.–ButIthinkhislatestoneisbetterworthre
