Unit1FoodforthoughtUsinglanguage语法课件高中英语

外研必修第二册UsinglanguageUnit1Foodforthoughta...Iwasabletoholdaknifeandfork-andchopsticks!bButtherearestillsomedishesthatDaddarenottryevenaftermanyyearsofmarriagetomymother.c...MumandIjusthavetofindawaytogethimintothekitchen!d...we’dbetternoteattoomuchroastfoodasitmaymakeussufferfromheatinsideourbodies,...e

“Youneedn’ttryitifyoudon’twantto,”Mumsaid,...Lookatthesentencesfromthereadingpassage.Thinkandworkoutthemeaningsofthewordsunderlined.ObserveanddiscoverModalverbs(情态动词)

canbeusedtoexpressthespeaker’smeaningofpossibility,permission,obligationandadvice,ability,etc.beafraidtodosomethinghavetheabilitytodosomethingbenecessaryorgivestrongadvicetodosomethinggiveadvicetodoornottodosomethingnotbenecessarytodosomethingNowlet’slearnmoreexamples.What'sthemeaningsofthewordscircled?1.ButthenIfiguredI'dbetterjustgoalloutandseewhathappens.(必修一U1P9)2.Alistairhadtochoose—brotherlylove,orachancetowintherace(必修一U3P32)3.Theyhavefoundoutthatthemonarchisabletotellthetimeofday.(必修一U5P50)4.Asanaturephotographer,Ihavetobravetheelements.(必修一U5P56)Fillintheblankswithappropriatewords.1.ButthenIfiguredI___________justgoalloutandseewhathappens.(必修一U1P9)2.Alistair_________choose—brotherlylove,orachancetowintherace(必修一U3P32)3.Theyhavefoundoutthatthemonarch____________tellthetimeofday.(必修一U5P50)4.Asanaturephotographer,I__________bravetheelements.(必修一U5P56)hadbetterhadtoisabletohavetogoReadyFocuson基本用法Modalverbsbeableto1dareneed&needn’thavetohadbetter23451.beableto

beableto

后接动词原形，表示能力时和can意思相同，可用于大多数时态，可与其他情态连用。①Heisableto/canwritemusic.

②Willyoubeabletocometomorrow

③Ihaven’tbeenabletofinishthebook.④Theywereabletoescapefromthebuildingwhenthefirebrokeout.他会作曲。明天你能来吗？我还没能看完那本书。火灾发生时，他们设法从那栋建筑里逃了出去。beableto

用于过去时态时，可以表示“某人过去或当时成功地做了某事”。2.dare①Hedarenotsaywhathethinks.

②Darehesaywhathethinks

③Ifhedaresaywhathethinks,itisgood.④Heneverdaredsaywhathethought.他不敢说出他的想法。他敢说出他的想法吗？如果他敢说出他的想法就好。他从不敢说出他的想法。a)dare

作情态动词，后接动词原形，表示“敢”，没有人称和数的变化，不用于肯定句，主要用于否定句、疑问句、条件句等。否定句形式：darenot(daren’t)疑问句形式：DareI/he/she...①Theydaretoswimacrosstheriver.

②Doeshedare(to)swimacrosstheriver

③Hedoesn’tdare(to)swimacrosstheriver.他们敢游过河去。他敢游过河去吗？他不敢游过河去。b)

dare

作实义动词，表示“敢……”，有人称和数的变化，不受句式限制，后跟动词不定式，即daretodosth.，在否定句或疑问句中的“to”可以省略。3.need＆needn’t①Needhegotherenow

②Heneedn’tgotherenow.

③Youneeddoitbutonce.④Allyouneeddoistocallhim.需要他现在过去吗？他只需做一次就行。a)

need

作情态动词，后接动词原形，表示“需要……”，没有人称和数的变化，不用于肯定句，主要用于否定句、疑问句、条件句等。你只需要给他打就行。他不需要现在过去。当need作情态动词，与all,but,before等暗含否定意义条件时，可用于肯定句。b)

needn’thavedone

表示“过去本不必做却做了的事”。①Wespentahellofalotofmoneythatweneedn'thavespent.

②

Heneedn'thavegonetohospital,buthewentjusttoreassurehimself.我们花了很多本来不需要花的钱。他本不必去医院的，去了只是想让自己放心点。4.havetohaveto表示因客观环境或事态的迫使而“不得不……；必须……”，可用于各种时态，有人称和数的变化，还可与其他情态动词连用，否定式为don’t/doesn’t/didn’thaveto，相当于needn’t。①Wemayhavetoputofftheplan.

②Didshehavetopayafine③You'regoingtohavetolearntogiveandtake.我们可能不得不推迟计划。她非得交罚款吗？你们必须学会互相迁就。1.haveto和must的区别must表示说话人主观上认为必须做的事以及职责义务等：haveto表示客观情况造成的必须要做的事：Imustgetupearlytomorrow.TherearemanythingsIwanttodo.Ihavetogetupearlytomorrow.Thetrainleavesat7:30.2.don’thaveto和mustn’t的区别must用于否定形式表示“禁止，一定不要”：haveto用于否定形式表示“没必要”：Youmustn’ttellothers.=Don’ttellothers.Youdon’thavetotellothers.=Youneedn’ttellothers.5.hadbetter①You'dbettersithereandhavearest.

②Shehadbetternottellliesanymore.

③Hadn'tthedoctorbetterseehim你最好坐在这儿休息一下。她最好再也别撒谎了。医生是不是去看看他比较好？

hadbetter

后接动词原形，意为“最好……”，用于现在或将来时，可用于一切人称，没有任何词形变化。否定形式为hadbetternot，疑问句形式将had（not）提前。Underlinethemodalsintheintroductiontoanappandtalkabouttheirmeanings.beafraidtodosomethingnotbenecessarytodosomethingbenecessarytodosomethinghavetheabilitytodosomethingdon'thavetheabilitytodosomethinggiveadvicetodosomethingP52CompletethetipsforgoodtablemannerswiththecorrectformofmodalsinActivity1.havetodarenothadbetterneedn'tbeabletoP53Modalverbs(情态动词)canbeusedtoexpressthespeaker'smeaningof_________,___________,____________and__________,_________,etc.possibilitypermissionobligationadviceabilityForexample:beableto;dare；need＆needn’thaveto;hadbetter注：另附word文档，点此链接。1.You__________gotoschooltomorrow,becauseitisSaturday.2.I'mafraidofdark,soI______________gooutaloneatnight.3.Althoughthedriverwasbadlyhurt,he__________________________explainwhathadhappened.4.Itisrainingheavilyoutside.You_____________notgooutnow.5.TheWangshadplannedatriptoHainan,butbecauseoftheheavyrain,they______________stayathomeinstead.needn’tdarenotwasabletohadbetterhadtoⅠ.用适当的情态动词填空，每空一词。1.—Whatdoyouthinkofhisadvice—Itcouldn'tbebetter.You__________________ _____________(最好接受他的建议).2.—Jim,how____________________________ (你怎敢说那话)toyourboss —SowhatHe'salwaystreatingusunfairly.3.—Theconcertwaswonderfullastnight.Didyou gotoit—No.Iwouldliketohave,butI__________ ________________(不得不照顾)mysick babyathome.hadbettertakehisadvicedareyou say thathadtolookafterⅡ.根据汉语提示完成下列对话，每空一词。4.—Lastyear,we_______________________ (能给)presentstoeachofthe80childrenat aschoolinourcommunity,andthrowa Christmaspartyforthem.Thisyearourgoal istoaddatleast20children.—Welldone!5.—IwillgiveacalltoMrs.Browntotellherthe news.—You_________________