單元語法聚焦(八)

Unit8ItmustbelongtoCarla.單元語法聚焦(八)情態(tài)動詞表示推測情態(tài)動詞can，could，may，might，must都可以表示推測，表示說話人對事情發(fā)生的可能性的推測。其結(jié)構(gòu)為“情態(tài)動詞＋動詞原形”。eg：Hemuststaythere.他一定待在那里。情態(tài)動詞表示推測時，肯定句一般用mustbe(一定是，肯定是)，might/couldbe(可能是)；否定句用can'tbe(不可能是)；疑問句用can。1．must表示對現(xiàn)在的狀態(tài)或現(xiàn)在正在發(fā)生的事情的推測時，must后面通常接系動詞be的原形。eg：Youhavestudiedhardforfivehours.Youmustbetired.你已經(jīng)學(xué)習(xí)了五個小時了，一定累了。2．“may/might/could＋動詞原形”多用于肯定句形式，其“推測，判斷”的語氣不能確定，用may意為“也許；可能”；用might不表示過去時態(tài)，只表示語氣較may更弱，意為“或許；大概”。eg：Idon'tknowwheresheis.ShemaybeinNewYork.我不知道她在哪兒，可能在紐約。TheguitarmightbeJane's.Sheplaystheguitar.這把吉他可能是簡的。她彈吉他。ItcouldbeMei'shairband.這可能是梅的發(fā)帶。3．“can/couldnot＋動詞原形”用于否定句或疑問句中，表示“否定推測或判斷”，有“不可能”之意。用can't還是用couldn't沒有時態(tài)差異，只是can't的語氣較couldn't強(qiáng)。eg：Thereisnolightintheroom.Shecan'tbeathomenow.房間里沒有燈光。她現(xiàn)在不可能在家里。1．Thetextbook

beLiMing's.Ithashisnameonit.2．Thebeautifultrousers

beJim's.Theyaretoolong.3．Thelargeshoes

beMary's.Shehassmallfeet.4．Thefootball

beWeiHua'sorTianHui's.Theybothplayfootball.5．Theguitar

belongtoSam.Heoftenplaystheguitar.mustcan'tcan'tmight/maymust二、單項選擇。()6.—Istillhaven'tfoundmypetdog.(2016·武漢)—I'msorrytohearthat.You________beverysad.A．mayB．mustC．shouldD．can't()7.—Who'ssinginginthegarden?—It________beMr.Brown.Healwayspracticessingingatthistime.A．mustB．can'tC．need()8.—Whereareyougoingthismonth？(2016·呼和浩特)—We________gotoXiamen，butwe'renotsure.A．needn'tB．mightC．mustD．mustn'tBAB()9.—WhoseT-shirtisthis?—It________beJohn's.It'smuchtoosmallforhim.A．mightB．can'tC．needn't()10.—Excuseme，whenarewegoingtohaveapicnic?—I'mnotsure.Askourmonitor，please.He________know.A．needB．canC．mayD．mustBC三、按要求完成句子，每空一詞。11．ThebeautifulcoatisMike's_sister's．(對畫線部分提問)_____________________thebeautifulcoat?12．TheEnglishbookmustbeSally's.(改為同義句)TheEnglishbookmust_____________________Sally.13．ThispersonmustbeaChineseteacher.(改為否定句)Thisperson____________beaChineseteacher.Whose

isbelong

tocan't14．她不可能正在實驗室等著你。(翻譯句子)She__________________________foryouinthe_______________.15．你昨晚熬夜了，現(xiàn)在一定困倦了吧。(翻譯句子)You__________________________nowafteryourstayinguplateyesterday.can't

be

waiting

laboratorymust

be

sleepy四、用must，might，can，could或can't完成下列對話。A：Tina，youlookworried.What'swrong?B：Ican'tfindmyEnglishbook.Where16.__________itbe？I17._______havelostit.A：Don'tworry.Let'sseewhereit18.______________be.B：IthinkI19.____________leaveitinthereadingroom.Butitisn'tthere.A：Whatdoesyourbooklooklike？Let'slookforittogether.B：It'sblu