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Unit4Whydon’tyoutalktoyourparents?Whydon’tyoudo...?句型句型“Whydon’tyoudo...?”意为“你为何不做……呢?”,用于向对方提出建议或征求意见。语气较为委婉、客气,易于接受。通常可与“Whynotdo...?”互换。例如:—Ididn’thaveagoodsleeplastnight,soIfeeltired.昨天晚上我没有睡好,因此觉得很疲倦。—Whydon’tyou/notgotobedearliertonight?你为何不今晚早点睡呢?连词until,although和sothat的用法1.until的用法。(1)until意为“直到……为止”,用于肯定句,主句的谓语动词一般是延续性动词,如live,read,run,teach,talk,work,watch等,表示这个动作一直延续到until所表示的时间为止。例如:IlivedinthishouseuntilIwastenyearsold.我在这个房子里一直住到10岁。(2)until意为“直到……才”,用于否定句,主句的谓语动词一般是非延续性动词,如begin,come,go,leave,stop,start等,表示这个动作直到until所表示的时间才发生。例如:Iwon’tleaveuntilyoucomeback.直到你回来我才会离开。2.although的用法。although意为“虽然;即使;尽管”,引导让步状语从句。同though用法相近,但though可作副词,位于句末。although和though一般都不与but同时使用。例如:Although/Thoughheisveryold,helooksstrong.虽然他的年纪很大,但他看起来还是很强壮。3.sothat的用法。(1)sothat意为“以便;为了”,引导目的状语从句,位于主句之后,从句中常用can,could,may,might等情态动词。例如:Pleaseopenthewindowssothatyoucanbreathefreshair.请把窗子打开,以便你能呼吸到新鲜的空气。(2)sothat意为“因此;所以”,引导结果状语从句,从句中谓语动词根据需要使用相应的时态,主从句间可用逗号隔开。例如:Shehadnotplannedhertimewell,sothatshedidnotfinishherhomeworkontime.她没把时间计划好,所以没按时完成家庭作业。Ⅰ.单项填空(A)1.ItisdifficulttorememberandwritetheChinesetraditionalcharacters(繁体字),theyareagreatpartofChineseculture.A.butB.andC.orD.until(D)2.—Howdoyoulikeyournewschool,Kate?—Itisverycleanandbeautifulitisabitsmall.A.ifB.sinceC.unlessD.although(D)3.—Mom,couldIwatchthegameshownow?—Sorry,youcan’twatchityoucleanyourroom.A.whenB.ifC.afterD.until(B)4.OurChineseteacherdidn’tgotobedhefinishedhisworklastnight.A.ifB.untilC.sinceD.because(A)5.Pleasespeakloudlyeveryonecanhearyou.A.sothatB.untilC.althoughD.butⅡ.用until,although或sothat填空1.Wearenotsistersalthoughwelooksimilar.2.Althoughsheisonly14,shecanmakemoneytohelpherparentssupportthefamily.3.Theteacherdidn’tbeginhisnewlessonuntileveryoneofusarrived.4.Couldyoupleaseexplainthemathproblemsothatwecanunderstandit?5.Theoldmanputonhisglassessothathecouldseemyfaceclearly.Ⅲ.用恰当的连词把下列简单句变成复合句,每空一词1.Wehadsupper.Myfathercameback.Wedidn’thavesupperuntilmyfathercameback.2.Herunsquickly.Hecouldgettothehotelontime.Herunsquicklysothathecouldgettothehotelontime.3.Theboyjumpsveryhigh.Heisnotverytall.Theboyjumpsveryhighalthoughheisnotverytall.4.Hewaited.Shefinishedspeaking.Hewaiteduntilshefinishedspeaking.