Unit8SectionA(GrammarFocus4c)課件人教版英語九年級全冊

Unit8ItmustbelongtoCarla.SectionA(GrammarFocus-4c)Tolearntounderstandandusemust,might,couldTousemodalverbstomakeinferencesLeadinMynameisMary.Thereisapictureofmyfamily.Doyouknowwhosebedroomitis?It________Mary’s.It________Mary’ssister’s.It________Mary’sparents’.maybemustbecan’tbePresentationWhosevolleyballisthis?ItmustbeCarla’s.Shelovesvolleyball.Whosehairbandisthis?ItcouldbeMei’shairband.OritmightbelongtoLinda.Theybothhavelonghair.Whatdidyouseethatnight?I’mnotsure,butitcan’tbeadog.Itwasbigger.Ithinkitmightbeabearorawolf.

表示推測的情態(tài)動詞在英語中，表示對某件事物的確定程度，即表示推測的時候，表示可能、懷疑、允諾、愿望、義務(wù)、必要、猜測等的動詞就是情態(tài)動詞。英語中表示推測的情態(tài)動詞主要有must,can,could,may,might等?？赡苄?must>can/could>may/mightcannot(can’t)couldnot(couldn’t)maynotmightnot情態(tài)動詞表推測情態(tài)動詞表示推測時，無時態(tài)區(qū)別，只有語氣差別1.must表示可能性最大的肯定推測，意思是“一定、準是”。含有must的句子（表推測）變?yōu)榉穸ň鋾r，要用can’t。must一般疑問句的否定回答用needn’t或don’thaveto，而不用mustn’t。mustn’t意為“不可以，不能”，表示禁止，不許可Hemustknowtheanswers./Hecan’tknowtheanswers.e.g.—Mustwehandinourexercisebooktoday?—Yes,youmust.(No,youneedn’t.)must還可表示有把握的推測，意為“一定、肯定”。must的過去式還是must。在回答以must開頭的一般疑問句時，否定式需用needn’t，表示“不必”的意思。2.can可表示能力/允許/可能性/懷疑猜測，意為“可以，會，能”；can’t意為“不會，不能，不可以,不可能”could為can的過去式；could還可用于現(xiàn)在時態(tài)中表示委婉客氣，相當(dāng)于can；could也可表示驚訝懷疑，不相信。Hecan’tpickherschoolbagup.Theycanbereadinginthelibrary.could表示某事有可能發(fā)生或可能是事實。Don’teatit.Itcouldgobad.Theplanecouldbeputoffbythestorm.

could還可用于表示客氣、禮貌、委婉的請求語氣Couldyoupleasehelpmewithmyhomework?3.may,might表示推測“可能性”時，意思是“可能”，“也許”。might不表示過去時態(tài)，語氣更委婉，可能性更小。may,might表推測時，可用于否定句，但不用于疑問句。Hemay/mightnotbeathome,butI’mnotsure.

情態(tài)動詞表示推測的意義和用法句式情態(tài)動詞含義用法肯定句must一定表示有把握的肯定推測may/might/could也許，可能表示沒有把握的推測否定句couldn’t/can’t不可能表示有把握的否定推測maynot/mightnot可能不表示不太有把握的否定推測疑問句can/could可能表示推測不同形式的情態(tài)動詞表示不同的含義情態(tài)動詞+動詞原形

表示對現(xiàn)在事情的推測情態(tài)動詞+be+動詞-ing

情態(tài)動詞+have+動詞的過去分詞

表示對正在發(fā)生的事情的推測表示對過去情況的推測

ThisbookmustbeJim’sbecausehisnameisonit.Mymothermightbecookinginthekitchen.Thegroundiswet.Itmusthaverainedlastnight.

1.A:Where’sJean?

B:I’mnotsure.She__________(is/mightbe/

mustbe)inthelaboratory.2.A:Everyoneisgoingtothepoolafterschool.B:Really?It_________(mustbe/can’tbe

/

couldbe)hotoutdoors.mightbemustbe4aPractice3.A:That’sthephone.

B:Hmm.Iwonderwhoit________(mustbe/couldbe/shouldbe).4.A:IwonderiftheseareJim’sglasses.B:They________(can’tbe/mightbe/couldbe)his.

Hedoesn’twearglasses.5.A:Ihearwaterrunninginthebathroom.B:It____________(couldbe/mustbe/can’t

be)Carla.

Shewasthinkingoftakingashower.

couldbecan’tbecouldbe1.A:Manypeoplearewearingcoats.B:Theweathermustbe_________________________.2.A:Sallyhasbeencoughingalot.B:Shemightbe_____________________.gettingcolder/coldoutsidehavingasorethroat/illCompletetheseresponses.3.A:Thisrestaurantisalwaysverycrowded.B:Thefood________________.4.A:WheneverItrytoreadthisbook,Ifeelsleepy.B:Itcan’t______________.mustbedeliciousbethatboring4bLookatthispictureofaroom.Howmuchcanyoutellaboutthepersonwholiveshere?Isitaboyoragirl?Whatarehis/herhobbies?Discussyourideaswithapartner.A:Itcouldbeagirl’sroombecauseit’sverytidy.B:

Iguessso.Butitmightbeaboy’sroombecausetheclotheslooklikeboys’clothes.4c中考鏈接用情態(tài)動詞的正確形式填空Afteralongwalk,you______feeltired.Theman______beMr.Li.HewenttoHKyesterday.Mymom__________________

gotovisitgrandpa.Iamnotsureofit.Thenotebook______beMary’sbecauseithashernameonit.mustcan’tmay/might/couldmust1.must,can/could,may/might等情態(tài)動詞表推測肯定推測：must,can/could,may/might都可以表示肯定推測must

表示把握性極強的推測，意為“肯定、一定”can/co