Unit8SectionAGrammarFocus-4c課件人教版九年級英語全冊3

GrammarFocus-4cUnit8ItmustbelongtoCarla.Bytheendoftheclass,youwillbeableto:

1.use“must;could/might;can’t”correctly

正確使用

must;could/might;

can’t2.makeinferencebyusing“must;could/might;can’t.”

ItmustbeCarla’s.Shelovesvolleyball.

ItcouldbeMei’shairband.OritmightbeLinda’s.Theybothhavelonghair.I’mnotsure,butitcan’tbeadog.LearningobjectivesWarmupGuessingGameI’mLily.Ilikedancing.Lily_______________beadancerwhenshegrowsup.could/may/might此處could/might/may表示推斷，意為“可能”，通常與be連用。Fillintheblankswithmodalverbs.GuessingGameThisfootball_____beLily’s.It______beLiMing’s.can’tmust此處can’t表示推斷，意為“不可能”。通常與be連用。(否定推測用can't)I’mLiMing.Ilikeplayingfootball.Itmustbeveryexpensive.Thepeoplewhodoitmustbeveryfit.Thatmightbefun.Itmaybetoochallengingforus.Itcouldbedangerous.Itcan'tbethatdangeroustogoonsafari.Somanypeopledoit.Lookatthesesentences.情態(tài)動詞表推測Lead-in情態(tài)動詞must，can，could，may和might均可表示推測，可以對過去、現(xiàn)在或?qū)淼那闆r作出語氣強弱不同的推測。Whosevolleyballisthis?ItmustbeCalar's.Shelovesvolleyball.Whosehairbandisthis?ItcouldbeMei'shairband.OritmightbelongtoLinda.Theybothhavelonghair.Whatdidyouseethatnight?I'mnotsure,butitcan'tbeadog.Itwasbigger.Ithinkitmightbeabearorawolf.GrammarFocus情態(tài)動詞mustcancouldmaymight情態(tài)動詞表推測大小can't約100%20%-80%possiblytrue幾乎0almostnottrue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肯定推測。否定句can’t/couldn’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肯定推測。疑問句can/could可能表示推測。情態(tài)動詞表示推測的意義和用法可能性mightmaycouldcanmustcan't0%-100%不可能也許，可能(4個)肯定,一定表示推測的情態(tài)動詞肯定句：mustmay/might/could一定也許可能表示有把握的肯定推測表示沒有把握的肯定推測否定句：can't/couldn'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Hemustbeveryhappywhenheheardthenews.Hemaybeinhisoffice,butI'mnotsure.Thatmancan'tbeyourteacher.Heismuchtaller.情態(tài)動詞表推測的用法CouldMissListillbeourmathteacherthisterm？注意：含有must的句子變?yōu)榉穸ň鋾r，要用can'tHemustbeathome.他一定在家。→Hecan'tbeathome.他不可能在家。(1)“情態(tài)動詞+動詞原形”，表示對現(xiàn)在的事情的推測。我不知道她在哪兒。她可能在武漢。I

don’t

know

where

she

is.She

may

be

in

Wuhan.(2)“情態(tài)動詞+be+動詞-ing形式”，表示對正在進(jìn)行

的事情的推測。那個穿著西裝的男人也許正跑著去趕公共汽車。The

man

in

a

suit

might

be

running

to

catch

abus.(3)“情態(tài)動詞+have+動詞的過去分詞”，表示

對過去或已經(jīng)完成的事情的推測。地是濕的，一定是下過雨了。The

ground

is

wet.

It

must

have

rained.拓展mustcan’t

may/might/could

may/might/couldcan’t1.A:Where’sJean?B:I’mnotsure.She_________(is/mightbe/mustbe)inthelaboratory.2.A:Everyoneisgoingtothepoolafterschool.B:Really?It_________(mustbe/can’tbe/couldbe)hotoutdoors.3.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’tbe)Carla.Shewasthinkingoftakingashower.4amightbemustbecouldbecan’tbemustbeExercises1.A:Manypeoplearewearingcoats.B:Theweathermustbe_________________________.2.A:Sallyhasbeencoughingalot.B:Shemightbe

_________________________.gettingcolder/coldoutsidehavingasorethroat/ill4bCompletetheseresponses.根據(jù)推測詞，補充說明理由3.A:Thisrestaurantisalwaysverycrowded.B:Thefood________________.4.A:WheneverItrytoreadthisbook,Ifeelsleepy.B:Itcan’t_______________.mustbedeliciousbeveryinterstingadj.

困倦的；瞌睡的Lookatthispictureofaroom.Howmuchcanyoutellaboutthepersonwholiveshere?Isitaboyoragirl?Whatarehis/herhobbies?Discussyourideaswithapartner.A:Itcouldbeagirl’sroombecauseit’s

verytidy.B:Iguessso.Butitmightbeaboy’sroombecausetheclotheslooklikeboys’clothes.4cIcanseeagirlinthepicture.Ithinkitmustbeagirl’sroom.Iguessnot.Butitmightbeaboy’sroombecauseingeneralboys

likeCD

more

than

girl.Itcould/might/can’tbe...because...Iguessso/Idon’tthinkso.Butitmight/could/mustbe...because…Askandanswerinpairs.情態(tài)動詞可以對現(xiàn)在/正在/過去的事情進(jìn)行推測

現(xiàn)在/將來：

一定/可能/不可能…

正在：

一定/可能/不可能正在做…

過去的：

一定/可能/不可能做了…這本書一定是吉姆的，因為上面有他的名字。ThisbookmustbeJim'sbecausehisnameisonit.我的媽媽可能正在廚房做飯。Mymothermightbecookinginthekitchen.地面是濕的。昨晚一定下雨了。Thegroundiswet.Itmusthaverainedlastnight.情態(tài)動詞+do情態(tài)動詞+bedoing情態(tài)動詞+havedone表推測的時態(tài)Task2情態(tài)動詞不表推測的用法（一）can1.表示能力

(=am/is/areableto)

eg.HecanspeakbothEnglishandFrench.

=HeisabletospeakbothEnglishandFrench.他能講英語和法語。2.表示允許（同may）回答用can/can’t/Certainly/Ofcourse/Certainlynot/Ofcoursenoteg.Can

Iuseyoureraser？我可以用一下你的橡皮擦嗎？Yes/Ofcourse,youcan.Guide幾個常見情態(tài)動詞的用法10'3.表示可能性

1)Canyougowithus?你能跟我們一起走嗎?2)Woodcanbemadeintopaper.木材可以造紙。注：表示能力時，cando=beabletodo，

can

只有過去式，beableto可以有各種時態(tài)，指將來具備的能力和過去已實現(xiàn)的能力須用beableto。1)Thebabywillbeabletospeakinsixmonths.2)Whenthefirehappened,hisfriendwasabletoescape.sleepy形容詞，意為“困倦的；瞌睡的”可用作表語或定語。sleepysleepasleep形容詞，意為“瞌睡的；困倦的”既可以是動詞也可以是名詞，意為“睡覺；睡眠”。sleeping作形容詞,意為“供睡覺用的”,一般作定語;也可以是動詞的-ing形式形容詞，意為“睡著的,在睡覺的”beasleep意為“睡著的”；fallasleep意為“入睡”。1.Ididn’thaveagood______lastnight,soIwasso______allday.2.Somestudentsfall______inclassonMondaybecausetheyplaywiththesmartphonestillmidnightonweekends.3.Ifyouneedaplacetostayforthenight,youcansleeponthefloorinoursittingroom,butbringa__________bagplease!

用sleep,sleepy,asleep或sleeping填空sleepsleepyasleepsleepingSummarizethegrammarrules.Summary注意語氣和時態(tài)本課句型Summary情態(tài)動詞表推測否定句疑問句肯定句結(jié)構(gòu)：對現(xiàn)在對正在進(jìn)行對過去時態(tài)：can不肯，may不問，must肯定不否問情態(tài)動詞+動原情態(tài)動詞+be+doing情態(tài)動詞+havedoneFillintheblankswithmust,might,orcan't.1.Thatbrightlight______beaUFO-there’snosuchthing!2.I’mstillwaitingforthebus,soI______beabitlatefortheparty.3.Thatsweater_____beCarla’s.She’stheonlyonewhowearssuchcolorfulclothes.4.Tony______wanttogototheconcert.Helikesmusic,butI’mnotsureifhelikesrockmusic.5.Thepersonyousawatthesupermarket_____beSusan.Ijusttalkedtoheronthephoneandshe’satworkrightnow.can’tmightSelfCheckmustmightcan’tChoosethebestanswer.4.—WhoseT-shirtisthis?

—It___beJohn's.It’s___

smallforhim.A.can't;muchtooB.can't;toomuchC.mustn't;muchtooD.mustn't;toomuch5.—Whereareyougoingthismonth?—We__