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ID:51063674
大小:2.59 MB
页数:20页
时间:2020-03-18
《九年级英语(人教) Section A Grammar Focus - 4c.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Unit8ItmustbelongtoCarla.SectionAGrammarFocus–4cItcouldbe__________.Italsomightbe______________.Canyouguesswhatitis?threebirdsabeautifulface课前预习Canyouguesswhatitis?Itcouldbe_________________.Italsomightbe______________.awhitevasetwofaces课前预习Itcouldbe______.Italsomightbe___________.Canyouguesswhat
2、itis?adogtwogirls课前预习CouldAbebiggerthanB?Infact,AandBmustbe____________.Whichoneisbigger,AorB?ABthesamesizeNo.课前预习Whosevolleyballisthis?ItmustbeCarla’s.Shelovesvolleyball.Whosehairbandisthis?ItcouldbeMei’shairband.OritmightbelongtoLinda.Theybothhavelonghair.Whatdidyouseethatnight?I’mnotsure,butit
3、can’tbeadog.Itwasbigger.Ithinkitmightbeabearorawolf.GrammarFocusgrammarUse“must”toshowthatyouthinksomethingisprobablytrue.Use“might”or“could”toshowthatyouthinksomethingispossiblytrue.Use“can’t”toshowthatyouarealmostsuresomethingisnottrue.GrammarFocus表示推测的情态动词有must,may,could,might,can。(1)must表示说话人
4、对事物的推测可能性的程度非常大,意为“一定;准是”;表示有把握的否定推测时用can’t,意为“不可能”。如:1.Ican’tfindmykeys.Imusthaveleftthemathome.2.--IssheMary?--Thatcan’tbeher.She’sinhospital.GrammarFocus(2)can表示“可能”,常用于否定句、疑问句中。could为can的过去式,表示推测的语气较can弱。如:--Canthemantherebeourmathteacher?--Hemaybe,butIamnotsure.GrammarFocus(3)may意为“也许”。might
5、为may的过去式,表示说话人对现在或将来不太确定的可能性的推测。如:LiMingmightgethereintime,butIamnotsure.GrammarFocus意思推测程度must一定,肯定100%的可能性maymight/could有可能,也许20%---80%的可能性can’t不可能,不会可能性几乎为零1.—Who’ssinginginthenextroom?—It____beher.ShehasgonetoNewYork.A.can’tB.mustC.shouldn’tD.can【解析】考查情态动词表推测。表示否定推测时,用can’t,意为“一定不……”。must表示推测
6、时,意为“一定……”,用于肯定句;根据答语“她已经去了纽约”可知是否定推测,故选A。例题解析A2.—WhoseT-shirtisthis?—It___beJohn's.It’s___smallforhim.A.can't;muchtooB.can't;toomuchC.mustn't;muchtooD.mustn't;toomuch【解析】情态动词的用法。根据句意“它不可能是约翰的,对他来说太小了。”故排除C、D,toomuch为“太多”的意思,muchtoo为“太”。故选A。例题解析3.—Whereareyougoingthismonth?—We______gotoXiamen,but
7、we'renotsure.A.needn’tB.mustC.mightD.mustn't【解析】needn’t(不必)表建议;must(一定)表猜测的可能性很大;might(可能,也许)表不是很肯定的猜测。mustn't(不允许)表命令。句意:---这个月你们将去哪?---我们或许去厦门,但还不确定。C例题解析4.---Haveyoudecidedwheretogoforyoursummervacation?---Notyet.We
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