GrammarⅠ.改错1．—Whatdoyousupposehashappenedtohim?—Idon'tknow.Heshouldhavegotlost.________________________________________________________________________2．—Jerrydoesn'tmindlendingyouhisbike.—Hecouldn't.IhaveborrowedMary's.________________________________________________________________________3．Ifhehadbeenhere,hecanhavegivenussomehelp.________________________________________________________________________4．Ididn'thearthephone.Ishouldhavebeenasleep.________________________________________________________________________5．MyEnglishChinesedictionaryhasdisappeared.Whowouldhavetakenit?________________________________________________________________________6．Greatchangesmusthavetakenplaceinthevillageinthepastfewyears,mustn'tthey?________________________________________________________________________7．Hemustn'thavewatchedTVyesterdayforIsawhiminthelab.________________________________________________________________________8．Janedidn'tcometo'schoolyesterday,sosheneedn'thavebeenill.________________________________________________________________________答案：1.should→may/might2.couldn't→needn't3.can→could/might/would4.should→must5.would→could6.mustn't→didn't7.mustn't→couldn't8.needn't→mustⅡ.完成句子1．You________________________(本来能得到)thechancetogoabroad，ifyouhadappiledforitearlier.2．Thegroundisn'twet.It________________________(不可能下雨)lastnight.3．—Tomisneverlateforwork.Whyisheabsenttoday?—Something________________________(肯定发生了)tohim.4．Sheseemstoknowthefilmquitewell.She________________________________(可能已经看过)before.5．It'sonlyfiveminutes'walk.We________________________(本来不必乘)ataxi.6．TheymusthavebeentotheGreatWall，________________(是不是)?答案：1.couldhavegot2.can'thaverained3.musthavehappened4.mayhaveseenit5.needn'thavetaken6．haven'ttheyⅢ.语法填空1．—Jerry________comebackbecausethewindowisopen.—Yes，buthe________leftitopenthismorning.答案：musthave；mighthave句意：——杰里肯定已经回来了，因为窗子开着呢。——是我，但也有可能今天早上他离开时就开着。第一空musthavedone是对过去情况的肯定推测；第二空是对过去情况的可能性的推断。2．—Mummy，Iclimbedtogettheteddybearfromthetopoftheshelf.—Mygoodness！You________(hurt)yourself.You________dothatnexttime!答案：mighthavehurt；mustn't句意：——妈妈，我爬到那个架子顶上把泰迪熊取下来了。——天哪！你有可能会伤到自己的。以后绝不能再干那事了！第一个空mighthavedone是对过去情况的肯定推测；mustn't表示禁止。3．(·柳州高一检测改编)—I'msorry.I________(shout)atyoutheotherday.—Forgetit.Iwasabitoutofcontrolmyself.答案：shouldn'thaveshouted句意：——对不起，前几天我不该对你大吵大闹。——算了，我自己也有点失去理智。根据时间状语theotherday(前几天)可知是对过去的事情表示后悔。should'thavedone“本来不该帮的事”即做了不该做的事。4．(·三明高一检测改编)YesterdayIfoundthecalculatorIthoughtIhadlost，I________(buy)anewone.答案：needn'thavebought考查情态动词＋havedone的用法。句意：昨天我找到了我以为丢了的计算器。我本来不必买一个新的。needn'thavedone“本来不必做某事”。根据句意可知这里是表示“本来不必要买”，所以needn'thavebought符合题意。5．That'sreallybad.You________(catch)thebusifyouhadbeeninahurry.答案：couldhavecaught句意：太糟糕了。如果你赶快点的话，你本来能够赶上公共汽车的。此句考查could在虚拟语气中的用法，“如果你赶快点的话，你本能够干赶上汽车的”表示与过去事实相反的假设，用couldhavedone。6．(·福州...
