人教版第三課時(GrammarFocus-4c)—單元同步語法精講精練Whydon'tyou...？的用法?“Whydon'tyou...？”意為“你為什么不……呢？”，通常用來提出建議，相當于“Whynot...？”。whydon'tyou和whynot后都跟動詞原形。對其作肯定回答時，常用“Goodidea./Soundsgreat.”等；對其作否定回答時，可根據(jù)實際情況作答。eg：—Whydon'tyoujointhesportsclub？你為什么不加入運動俱樂部呢？—Goodidea.好主意?！猈hydon'tyoubuythisbike？你為什么不買這輛自行車？—Well，itistooexpensive.哦，它太貴了。【拓展】用于提建議類似的表達方式還有：What/Howaboutdoingsth.？做某事怎么樣？Let'sdosth.讓我們一起做某事吧。Shallwe/Idosth.？我們/我來做……好嗎？hadbetterdo/notdosth.最好做/不做某事Wouldyoupleasedosth.？請你做……好嗎？Wouldyouliketodosth.？你想去做某事嗎？Wouldyouminddoingsth.？你介意做某事嗎？連詞although，sothat，until的用法?although意為“盡管；雖然”，相當于though，用來引導讓步狀語從句。句中用了although或though，就不可再用but。若要強調(diào)前后兩部分的對比意義，可在主句前加yet或still。eg：Although/Thoughhehasalotofmoney，yet/stillheisunhappy.他雖然有很多錢，但并不幸福。?sothat意為“目的是；為的是；以便”，引導目的狀語從句，從句中通常含情態(tài)動詞can，may，might等。eg：Hegotupveryearlysothathecouldcatchtheearlybus.他起床很早，為的是能趕上早班公共汽車?！就卣埂縮othat引導的目的狀語從句可與inorderthat或inorderto結(jié)構(gòu)相互轉(zhuǎn)換。?until與延續(xù)性動詞連用時，動詞用肯定形式，表示“直到……為止”，指主句的動作一直持續(xù)到until后的動作發(fā)生為止；與短暫性動詞連用時，動詞須用否定形式，意為“直到……才……”，指主句的動作一直到until后的動作發(fā)生時才發(fā)生。eg：Iwaiteduntil3：00，buthedidn'tcome.我一直等到3點，但他沒來。(wait為延續(xù)性動詞)Thenoiseofthestreetdidn'tstopuntilmidnight.街上的喧鬧聲一直到半夜才停止。(stop為短暫性動詞)

一、根據(jù)句意，選用until，sothat或although填空。1．Youcouldtakelotsofexercise_________youcankeephealthy.2．Iwillwait________MissJonescomesbackfromwork.3．___________itisnoteasytolearnEnglishwell，Iwon'tgiveup.4．Thelittlebabydidn'tstopcrying_________hesawhismother.sothatuntilAlthoughuntil二、按要求完成下列句子。每空一詞。5．Whydon'tyoucallherback？(改為同義句)____________callherback?____________________callingherback?6．Theyfeltsotired，buttheystillwentonworking.(改為同義句)____________________theyfeltsotired，theystillwentonworking.7．Theyarrivedveryearlyinordertoseetheirfavoritestars.(改為同義句)Theyarrivedveryearly____________theycouldseetheirfavoritestars.8．Davewenttobedafterhefinishedhishomeworklastnight.(改為同義句)Dave__________gotobed__________hefinishedhishomeworklastnight.WhynotWhat/HowaboutAlthough/Thoughsothatdidn'tuntil本課時其他知識點精講精練?return動詞，作“歸還”講時，常用于returnsb.sth.或returnsth.tosb.結(jié)構(gòu)中，相當于givesth.back；作“回來；返回”講時，常用“returnto＋地點名詞”，相當于comeback。一、按要求完成下列句子。每空一詞。1．Canyougivethebooksbacktomenextweek？(改為同義句)Canyou________thebooks____menextweek?2．Heisnotachildanymore.(改為同義句)Heis_________________achild.3．你不應(yīng)該抄襲同學的作業(yè)。(翻譯句子)You________________yourclassmates'homework.4．我妹妹害怕在許多人面