Unit+8+SectionAGrammar+Focus~4c 人教版九年级英语全册

Unit8ItmustbelongtoCarla.SectionAGF---4c能熟练运用情态动词must,might,could,can’t作出推测。1能掌握表推测的情态动词must,might,could,can’t的用法。2一定，肯定，准是ItmustbeCarla's.Shelovesvolleyball.Whosevolleyballisthis?“Must”toshowthatyouthinksomethingisprobablytrue.ItcouldbeMei'shairband.OritmightbelongtoLinda.Theybothhavelonghair.Whosehairbandisthis?“Could”or“might”toshowthatyouthinksomethingispossiblytrue.可能可能注意！might表推测不用于疑问句，而could可用于肯定句、否定句和疑问句。I'mnotsure,butitcan'tbeadog.Itwasbigger.Ithinkitmightbeabearorawolf.Whatdidyouseethatnight?“Can't”toshowthatyouarealmostsuresomethingisnottrue.不可能结合前几节课的内容，回忆归纳情态动词must,might,could,can’t的意义和用法？推测可能性：must﹥could﹥might﹥can’tmust在此表示猜测,译为''肯定,极可能'',后接动词原形。can't在此表示猜测,译为''不可能'',后接动词原形。might/could在此表示猜测,译为''也许,可能'',后接动词原形。情态动词must,might,could,can’t分别用在什么句式中？Summary2句式情态动词用法意义例句肯定句must表示有把握的肯定推测

一定；

肯定Miller

must

be

verytired

after

a

longjourney.could/may/might其肯定程度逐渐减弱，表示把握不大的推测可能Itmightrainthisafternoon.否定句can’t表示有把握的否定推测不可能Amycan’tbeatschool.It’sSundaytoday.疑问句can/could表示推测可能CanPeterstillbealiveaftersomanyyears?Whosevolleyballisthis?ItmustbeCarla’s.Shelovesvolleyball.Whosehairbandisthis?ItcouldbeMei’shairband.OritmightbelongtoLinda.Theybothhavelonghair.Whatdidyouseethatnight?I’mnotsure,butitcan’tbeadog.Itwasbigger.Ithinkitmightbeabearorawolf.肯定句否定句情态动词表示推测在不同时态下有哪些结构形式？Summary3结构形式用法例句情态动词+

动词原形表示对现在的事情的推测Somethingmustbewrongwithmybike.情态动词+be+动词的-ing形式表示对正在发生的事情的推测Mybrothermightbehaving

breakfastathome.情态动词+have+动词的过去分词表示对过去或已经完成的事情的推测Imusthaveputmykeyssomewhereinthebedroom.

Grammar:情态动词表推测可能性:must>can/could>may/mightcannot(can’t)couldnot(couldn’t)maynot/mightnot否定否定意思推测程度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.--Whosebookisthis?

--It

mustbe

Mary’s.

It

mustbelongto

Mary.3.Thehairband

mightbelongto

Linda.

mightbe

Linda’s.2.--WhoseFrenchbookisthis?

--It

couldbe

Ali’s.ShestudiesFrench.4.TheT-shirt

can’tbe

John’s.

It’smuchtoo

smallforhim.(肯定;一定)(可能)(可能)(不可能)

情态动词表示推测可以分为以下几种情况:

★情态动词+do

此结构表示对现在或将来情况的推测和判断

—Doyouknowwheresheisnow?—IthinkshemighttravelinBeijing.

★情态动词+bedoing

此结构表示对现在或将来正在进行的情况的推测和判断。

Atthismoment,myfathercan’tbeworkingintheoffice.★情态动词+havedone

此结构表示对过去情况的推测和判断。

Theroadiswet.Itmusthaverainedlastnight.

★情态动词+havebeendoing

此结构表示对过去正在进行的情况的推测和判断。

Yourmothermusthavebeenlookingforyouatthatmoment.

sleep,sleepy&asleep的辨析sleep,sleepy和asleep这三个词都与“睡觉”有关，但它们的含义和用法有区别。单词词性含义用法例句sleep名词睡眠不可数名词Justliedownandgetenoughsleep.一次睡眠；一段睡眠时间前可加aI’llgoupstairsandhaveasleep.动词睡觉；睡不及物动词Didyousleepwelllastnight?单词词性含义用法例句sleepy形容词困倦的；瞌睡的既能作定语，也能作表语Doyouknowthesleepygirl?I’mtoosleepy

tofinishmyreport.asleep形容词睡着的通常作表语；常和be或fall搭配使用IfIamasleeponthebus,pleasewakemeupwhenyougetoffthebus.根据句意及汉语提示完成单词1.Theboringmoviemadehimfeel________(瞌睡的).2.Thegreatscientistisalwaysbusyworkingin____________(实验室).sleepylaboratories3.It’shottoday,andyoudon’tneedtowearthe________(外套).4.It’snecessaryforustogetourselves__________(在户外)andintonaturetokeephealthy.coatoutdoors二、用must、might、could或can’t填空(语法专练)6.Thephoto________beLiMing’s.Thosearehisparents.7.Thehomework________beCarol’s.Sheisn’tatschooltoday.【解析】6.用语境判断法。根据语境可知此处表示肯定推测，故填must。【解析】7.根据语境可知此处表示否定推测，故填can’t。mustcan’t8.Ican’tfindmybackpack.It_______________bestillatschool.9.—Whoisthatman?Isheourmathteacher?—It________behim.Hehasgonetovisithisparents.【解析】8.用语境判断法。根据语境可知此处表示推测，故填might/could。【解析】9.根据语境可知此处表示否定推测，故填can’t。might/couldcan’t二、按要求完成下列句子1.ThecoatmustbeMike’s.(改为同义句)Thecoat____________________________________.2.Maybeheisathome.(改为同义句)He__________________athome.mustbelongtoMikemaybe3.Thewomanovertheremustbehismother.(改为否定句)Thewomanoverthere__________________hismother.4.他可能正在跑步锻炼。(完成译句)He____________________forexercise.5.听！一定有人在隔壁房间唱歌。(完成译句)Listen!There___________somebody___________inthenextroom.can’tbecouldberunningmustbesinging

完成句子。1.这里过去是一个安静的地方。

It__________________averyquietplace.2.他