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写作专题讲析第四讲熟悉三大复合句式，增加得分亮点1．名词性从句(1)主语从句：在句子中充当句子主语的从句。Whenthedelayedflightwilltakeoffdependsmuchontheweather.那架延误的班机什么时候起飞在很大程度上取决于天气。(2)宾语从句：在句子中作及物动词或介词的宾语。ExpertsthinkthatitistoughforhumanbeingstoliveontheMars，becausetheywillfacethebittercoldweather，lonelinessandfear.专家们认为对人类来说在火星上居住是艰苦的，因为他们将面临严寒天气、孤独和恐惧。(3)表语从句：在句子中起表语作用的从句。Thequestioniswhetherweshallrunoutoffoodsoon.问题是我们的食物是否很快会吃完。(4)同位语从句：在复合句中充当同位语的从句。Hemadeapromisethathewouldnevercomelate.他承诺永不会迟到。2．定语从句在复合句中作定语用来修饰句子中某一名词或代词的从句，包括限制性和非限制性定语从句。However，Iwasbusypreparingformyfinalexamatthattime，whichwasofvitalimportanceforme.然而，那时我忙于准备期末考试，这对我来说非常重要。3．状语从句在复合句中作状语，其位置可以在主句前或主句后。其中包括下列从句：(1)时间状语从句通常由when，as，while，after，before，assoonas，since，till(until)，whenever等引导。Whenthecityisstillsleepingsoundlybeforethedawncomeson，itisthecleanerswhosweepthefloorsorstreetsinspiteofthechillywindortheheavyrain.黎明前城市仍然沉寂在一片酣睡中时，不管寒风还是大雨，是清洁工们在清扫着地面或街道。(2)地点状语从句通常由where，wherever等引导。WhereverImaybe，I'llrememberthatI'maChineseforever.无论我在哪里，我都会永远牢记自己是一位中国人。(3)原因状语从句通常由because，since，as和for等引导。Since/Astheweatherissobad，wehavetodelayourjourney.由于天气如此之差，我们不得不推迟旅行。(4)目的状语从句通常由sothat...，inorderthat...等引导。(5)结果状语从句通常由sothat...，so...that...等引导，往往放在句尾。(6)比较状语从句通常由as，than，as(so)．..as等引导。(7)让步状语从句通常由though(although)，as，evenif(eventhough)，however，whatever等引导。(8)条件状语从句通常由if，unless，aslongas等引导。Afterclass，Ilearnedfromtheteacherthatmydeskmatewouldhavedroppedoutofschoolifhehadn'tbeenhelpedbyothers.课后，我从老师那里了解到，如果我的同桌没有得到其他人的帮助的话他就辍学了。(9)方式状语从句通常由as，(just)as...so...，asif，asthough等引导。【注意】如果一个句子有多个谓语，那么这个句子可能是并列句或者是复合句。如果有并列连词，就是并列句，如果没有就是复合句。学即练Ⅰ.用适当的连词填空1．Ithink________it'sourdutytohelpparentsdosomehousework.2．Itookpridein________Ihaddoneintheabsenceofmyfather.3．It'sreported________somevolunteerswhoareatleast18yearsoldwillbechosenfromallovertheworldtotheMarsinthefuture.4．Iwouldappreciateit________youcouldselltheknotsfor10dollarseach.5．It'sourdesire________youshouldprovidesomemoneytofundourprogram，aswellasofferussomepracticalsuggestions.6．________cleaningstreetisnomorethananordinaryjob，itcontributestothesociety.7．—Irangyouataboutnine，buttherewasnoreply.—Oh，thatwasprobably________Iwasseeingthedoctor.8．Besides，Iwilltellhimwhatyoulooklike________youcanfindeachothereasily.答案：1.that2.what3.that4.if5.that6.Although7．when8.sothatⅡ.请用恰当的连词翻译下列复合句1．这本书与我上月读的非常不同。________________________________________________2．跟着那个女孩，我们走进墙上悬挂着几幅著名科学家画像的大厅。________________________________________________3．这些花太特殊了以至于我将尽我的所能救活它们。________________________________________________4．人类登上另一星球的日子很快就会来临。________________________________________________5．农村不像大城市那样有这么多的污染。________________________________________________答案：1.ThebookisquitedifferentfromwhatIreadlastmonth.2．Followingthegirl，wewentintoahall，onwhosewallshungafewpicturesofsomefamousscientists.3．TheseflowersaresospecialthatIwoulddowhateverIcantosavethem.4．Thedaywillsooncomewhenmansetsfootonanotherplanet.5．Thereisn'tsomuchpollutioninthecountryasinbigcities.