Unit5語法精講專練

Unit5ItmustbelongtoCarla.語法精講情態(tài)動詞must,should,can,may,could,might都可表推測。must在這里表示推測。【肯定推測】=1\*GB3①must用于肯定句，表示較有把握的推測，意為“準(zhǔn)是，一定”。后面接動詞原形，表示對現(xiàn)在的推測。如：—I’vehadnosleepfor48hours.我已經(jīng)48小時沒睡覺了?！猋oumustbeexhausted.你一定筋疲力盡了。=2\*GB3②should用于肯定句中，語氣次之，意為“很可能，應(yīng)該”，指按常理推測。如：Theyleftyesterday.Theyshouldbehomebynow.他們昨天就離開了，現(xiàn)在該到家了。=3\*GB3③can用在肯定句中，表示理論上的可能性。如：Smokingcancausecancer.吸煙有可能引起癌癥。=4\*GB3④may用在肯定句中，表示對現(xiàn)在把握不大的推測，意為“也許，可能”。如：Don’tplaywiththeknife.Youmaycutyourself.不要玩小刀，你可能會傷了自己。=5\*GB3⑤could,might也可表示推測意義，常用在過去時態(tài)中；但在某些場合下，為了使語氣更緩和、更委婉，常用could,might代替can,may。如：Theysawsomethingintheskylastnight.Itcould/mightbeaUFO.昨天晚上他們看見天空中有個東西。它有可能是不明飛行物。Youmay/might/couldbeverytired.你可能很累吧！【否定推測】=1\*GB3①表示否定的推測時，cant/couldn’t語氣最強，指“不可能”，帶有驚異、懷疑的感情色彩。如：Thestorysoundsreasonable,butitcantbetrue.這個故事聽起來合情合理，但不可能是真的。=2\*GB3②語氣不很肯定時，常用maynot或mightnot表否定推測，意為“可能不，也許不”。如：Hemaynot/mightnotbeathome.他可能不在家?！疽蓡柧渲械耐茰y】疑問句中的推測，常用can或could，意為“可能”。如：Whocanitbe?CanitbeJenny?那能是誰呢？是瑪麗嗎？語法專練=1\*ROMANI.根據(jù)句意，用適當(dāng)?shù)那閼B(tài)動詞填空。1.--whoseskirtisthis?--Ithinkit_______beAnna’s．Sheistheonlygirlwhowearsaskirtinourclass．2.--whoseearringisthis?--It_______beAlice’s．Shewearsearringssometimes．3.--Whosejeansarethese?Ifoundthemonthechairinthelivingroom．--They_______bemine．Iputallmyjeansonmybed．4.--IsthisJim’sfootball?--Yes,it_______behis．Thereishisnameonit．5.--Ijustfoundatoycarinthekitchen．Whoseisthis?--Oh，that_______beTom’s．He’sbeenlookingforitfortwohours．6．Thatmanwhoisplayingbasketball______beMr.Smith．Heisillinbed．7．There______besomethingwrongwithmywatch．Itdoesn’twork．8．LucyhasbeentoCanadaforseveralyears．She______beatallgirlnow．9．You______swimintheriver．It’sdangerous．10．She______beoverfifty．Shelookssoyoung．11.ThisMP4player______beJim’s，hutI’mnotsure．12.Ginaisaverykindgirl．She______beverypopularinherclass．13.--Look!Theboyinblue______beLiMing．HeisalwaysreadingEnglishthereeverymorning．--No，it______behim．HeistalkingwithMr.Greenintheclassroom．14.You______besosleepy,Jim．Youhadagoodsleepyesterday．15.Lookatthedarkclouds!There______beaheavyrain．=2\*ROMANII.選擇填空1.---Myhouseisverynearabusystreet．---It______beveryquiet．AcanBmustC．can’tD．mustn’t2.---IsMr.Browndrivinghere?---I’mnotsure．He______comebytrainA.mayBshallC．needD．must3.---Let’sgototheconcerttonight，Michael---Sorry，I______.Ihavetohelpmymotherwiththehousework．Amustn’tBmaynotC．needn’tD．can’t4.---Listen!IsRosesinginginthenextroom?---No．It______beRose．ShehasgonetoShanghai．A.maynotB.can’tC.mustn’tD．needn’t5.---OurclasswontheEnglishspeakingcontest．---Congratulations!You______beveryproudofit.A.canB.needC.wouldD．must6.---ThesportsshoesmustbeLinda’s．---No．they______be.They’retoosmallforher．A.mustn’tB.can’tC.maynotD．mightnot7.---Excuseme．HowcanIgettotherailwaystation?．---Turnleftandthenfollowyournose.You______missit!A.mustn’tB．can’tC．shouldn’tD．needn’t8.---Dad.mustIfinishmyhomeworktoday?---No，you______．Youmaydoittomorrow．Aneedn’tBmustn’tCdon’tD．won’t語法專練=1\*ROMANI.1．mu