原因、目的、结果状语从句

状语从句：原因，结果，目的状语从句,一、原因状语从句通常由because,since,as,for等词来引导。连词because,as,since,for的用法区别：because表示原因时，用法最为广泛，语气也最强。它所引导的从句可以放在主句之前或在主句之后。例：1)-Whyareyoualwayslateforschool?Becausemyhomeisfarfromhere.你为什么总是迟到？因为我家太远。2)Hecantcometothepartybecauseheisbusy.因为他忙，所以不能来参加这个聚会。,as在表示原因时，语气较强。它所引导的从句常放在主句之前，意思是“由于”；把众人所知的事实当作理由。例：1)Asthebadweather,hewaslosthiswayyesterdaymorning.由于恶劣的天气，他昨天早晨迷路了。2)AsMr.Liuisthenewcomer,hedoesnthavetoomanyfriendshere.刘先生由于初来乍到，因此在这儿没有太多的朋友。,since语气较弱。它所引导的从句一般放在主句之前，意为“既然”；就对方陈述的事实作为理由。例：1)SinceLiMingdoesntknowtheanswerstotheproblems,letsaskWangLeitodoit.既然李明不知道这道题的答案，那就让王磊来回答吧。2)Sincewearegoodfriends,pleasecallmeifyouneedhelp.既然我们是好朋友，如需要帮助，请尽管打电话。,相比较而言，for的语气最弱。其引导的从句放在主句之后，所表述的理由是对某一事实进行推断。例：1)Hethankedmeformyhelp.他因为我帮助了他而感谢。2）Thewomandidntbuythatcoatforitistooexpensive.那位女士没有买那件上衣是因为它太贵了。,二、目的状语从句一般由inorderthat,sothat来引导。二者都表示“以便、为的是”之意。此时，句中往往会用一些相关的情态动词来加以说明。例：1)IllhavetorunfastsothatIcancatchupwiththeminashorttime.(目的)我得快跑以便我能在短时间内赶上他们。2)Iopenedthewindowsothatfreshaircouldcomein.(目的)我把窗户打开以便新鲜空气可以进来。3)Wewilltellyoueverythingaboutitsooninorderthatyoucanprepareforthat.不久我们将会让你知道详情,以便你能够做准备。(目的),三、结果状语从句通常由连词sothat,suchthat引导。二者都表示“如此以至于”之意。例：1)Theteachersteachingwassointerestingthatallthestudentswereveryexcited.老师讲课非常有趣，学生们都感到很兴奋。2)Jackstudiessohardthathealwaysmakesprogress.杰克学习很是努力，结果他不断取得进步。3)Itssuchanicedaythatallofuswanttogocamping.天气是如此的好，我们大家都想去野营。,sothat与suchthat的用法区别：so+形容词或副词+that+从句such+形容词+a(an)+单数可数名词+that+从句。但是这两种句型往往可以互换。例：1)Mygrandfatherissokindthateveryonelikestalkingwithhim.(=Mygrandfatherissuchakindpersonthateveryonelikestalkingwithhim)我爷爷心地善良，大家都喜欢和他聊天。2)ItissocoldthatIhavetowearwarmclothes.(=ItissuchcoldweatherthatIhavetowearwarmclothes.)天气如此的冷，以至于我不得不穿上暖和的衣服。,专项练习一、选择恰当答案。1.Pleasespeakloudly_allofuscanhearyou.A.sothatB.ifC.whenD.although2.HelearnedalittleJapanese_hewasatmiddleschool.A.thoughB.althoughC.asifD.when3.Shewas_tired_shecouldnotwalkanymore.A.very,thatB.such,thatC.so,thatD.so,as,4.Iwenttoschoolinahurry_Iwouldntbelateforclass.A.sinceB.sothatC.asifD.unless5.Thechildwas_earlyinthemorning.A.enoughexcitedtogetupB.tooexcitedtogetupC.soexcitedthathegotupD.veryexcited,hegotup6.Bringitnearer_Icannotseeitclearly.A.althoughB.sothatC.becauseD.since,7.Itwas_thatshecouldntfinishitbyherself.A.sodifficultaworkB.suchadifficultworkC.sodifficultworkD.suchdifficultwork8.Hecantbuythecar_itwastooexpensive.A.forB.whenC.thatD.if9.Iarrivedthere_late_Ididntmeethim.A.too;toB.such;thatC.so;thatD.so;as,10.Itis_hotintheroom_wehavetousethefans.A.such;thatB.so;thatC.as;asD.such;as11._youhavenotime,Ihavetoasksomeoneelsetoplayfootball.A.SoB.SuchC.SothatD.Since12.Liftitup_Imayseeit.A.thoughB.sothatC.asD.than,13.Ithinkweshouldgobyplane_wecangetthereearlier.A.assoonasB.whereC.inorderthatD.as14.Lilywenttoseethedoctoryesterday_shewasill.A.becauseB.butC.untilD.if15.Idliketogoswimmingnow_itisveryhot.A.forB.becauseC.ifD.whether,二、将下列句子已成英文。1、他太高兴了，以至于说不出话来。Hewassoexcitedthathecouldsaynothing.2、因为他就住在河边，因此很擅长游泳。Becausehelivesbytheriver,heisverygoodatswimming.3、