WelcomeUnit3ShediditsothatKyliecouldavoidproblemswithherparents.Hediedbecausehedidnotstoptotakecareofhishand.They’restandingupbecausethey’rebothgoingtoplay.Therewerefewdoctors,sohehadtoworkveryhard.They’restartingagain,sobequiet!常用引导词：becauseDavidhasbeenveryluckybecausehishobbyhasbroughthimenjoymentandsuccess.大卫是幸运的，因为他的爱好给他带来了欢乐和成功。Itdoesn’tmatterbecauseallthedarkdayshavegone.没关系，因为所有灰暗的日子都已经过去了。Doctorscouldn’tsaywhatwaswrongbecausetheydidn’tknowwhatkindofsnakeitwas.因为医生不知道是哪类蛇咬伤他的，所以他们也无法说出伤势情形。IwanttorefusePeterbecauseIthinkit’sdishonesttocopymyhomework.我应该拒绝皮特因为我认为他抄我的作业是不诚实的做法。Thecomputerwasn’tworkingbecauseithadavirus!电脑由于中了病毒不能工作了！I’mworriedaboutherbecauseshe’sunhappy.我担心她是因为她不开心。Sallywillwinbecauseshe’stherealherotonight.萨莉会胜利因为她才是今晚真正的英雄。IdoitbecauseIlikeit.我做这件事是因为我喜欢。从上面句子可以看出,because引导的原因状语从句一般放于主句之后,表示直接原因,用来说明人所不知的原因,语气最强,用来回答why引导的疑问句。注意:because习惯上不能与so连用;because引导的原因状语从句有时可以与带有becauseof短语的句子互换。eg:常用引导词：sothat,inorderthat常用引导词：so,so...that…,such…that…注意Useso,sothatorbecause.YangLiweijoinedthespaceprogrammebecausehewantedtobeanastronaut.Hetrainedforfiveyears(1)_______hecouldbecomeanastronaut.PeopleonEarthwatchedTV(2)______theycouldseehisspaceflight.YuriGagarinwentintospaceinApril1961,(3)____hewasthefirstmaninspace.NeilArmstrongandBuzzAldrinlandedontheMoonin1969,(4)____theywerethefirstmenontheMoon.AstronautsenjoyseeingEarthfromspace(5)_________it’ssobeautiful.NormanBethunewantedtohelppeople.Hebecameadoctor.NormanBethunewantedtohelppeople,sohebecameadoctor.LinglingthinksSally’sahero.SallygaveKylieachancetoplay.3.NormanBethunetraineddoctors.Theycouldsavelives.5.ZhanTianyoubuiltarailroad.PeoplecouldtravelfromBeijingtoZhangjiakou.6.ZhanTianyoubuiltbridgesandtunnels.Therailroadcouldgothroughthemountains.1.Itwasonlyareason/anexcuse.Itwasn’ttrue.2.Welike/lookforwardtohearingSallyplayintheconcertnextSaturday.3.She’sverybrave/strongtoplayinfrontofsomanypeople.4.Icanguess/imaginehowworriedshefeels.5.Yes,thethought/soundofplayi