Unit1FoodforThoughtGrammarModals課件高一英語

Lead-inIwasableto

holdaknifeandfork—andchopsticks!ButtherearestillsomedishesthatDaddarenot

tryevenaftermanyyearsofmarriagetomymother.MumandIjusthaveto

findawaytogethimintothekitchen.Wehadbetternoteattoomuchroastfoodasitmaymakeussufferfromheatinsideourbodies.“Youneedn’ttryitifyoudon’twantto,”Mumsaid.a.beabletob.darenotc.havetod.hadbettere.needn’t1.beafraid害怕todosomething2.notbenecessarytodosomething3.giveadvicetodoornottodosomething4.benecessary必要的orgivestrongadvicetodosomething5.havetheability能力todosomethingMatchthemeaningstothephrases.ModalsGrammar：Modals

UNIT1FoodforThought

情態(tài)動詞(Modals)表示說話人的某種語氣或者情緒，如：可能，意愿，猜測，義務(wù)，需要等。情態(tài)動詞本身具有一定的詞義。常見的情態(tài)動詞包括can(could),may(might),will(would),shall(should),oughtto,hadbetter,must,haveto，need,dare,usedto等。本單元主要講情態(tài)動詞：beableto,dare,haveto,hadbetter,need.1.

基本特征：(1)情態(tài)動詞不能單獨(dú)做謂語，后面接動詞原形；(2)情態(tài)動詞沒有人稱和數(shù)的變化（beableto，haveto除外）2.基本用法：beabletodare＆needhavetohadbetterbeabletodosth.=havetheabilitytodosth.1.beableto

后接動詞原形，表示某人能夠做某事，有時態(tài)和數(shù)的變化。2.beableto

用于過去時態(tài)時，表示“某人過去或當(dāng)時成功地做了某事”=managedtodosth/succeededindoing。IfIworkharder,Iwillbeabletomakegreaterprogress.Therewasabigfireyesterday.Luckily,everyonewasabletoescapefromthefire.darenotdosth.不敢做某事=beafraidtodosth.

1.dare

作情態(tài)動詞時，沒有時態(tài)和數(shù)的變化，否定式是darenot，主要用于否定句和疑問句中。2.dare

用作實(shí)義動詞時，后接todo，有時態(tài)和數(shù)的變化。用在肯定句中。Shedarenotgooutaloneatnight.Shedarestogooutaloneatnight.needn’tdosth.不必做某事=notbenecessarytodosomething

1.need

作情態(tài)動詞時，沒有時態(tài)和數(shù)的變化，用于否定句needn’t或疑問句中。

2.need作實(shí)義動詞，有時態(tài)和數(shù)的變化；后接todo，常用于肯定句Heneedstoearnmoremoneytosupportsuchalargefamily.

1.haveto有時態(tài)和數(shù)的變化，強(qiáng)調(diào)客觀需要，意為“不得不”否定形式是don’thaveto，相當(dāng)于needn’t不必。2.must無時態(tài)和數(shù)的變化，強(qiáng)調(diào)主觀意愿，意為“必須”。haveto不得不=benecessaryorgivestrongadvicetodosth.Therewerenobuses;wehadtowalkallthewayhome.ImuststudyhardformyfuturebecauseknowledgeismoneyYoudon’thaveto/needn’tbringagiftifyoudon’twantto.hadbetter

后接動詞原形，意為“最好....”，

無有時態(tài)和數(shù)的變化。否定式hadbetternotdo，構(gòu)成疑問句時將had置于主語前。hadbetternotdosth最好別做某事。hadbetter最好=giveadvicetodoornottodosth.Whathadwebetterdo?我們最好怎么辦？ShehadbetterapologizetoTomforherhadbehaviour.Let’spractice!Ifyou1________(dare)trya‘painful’diettostayhealthy,thisnewappistheperfectsolution—andyou2_______(need)payforit!Theappworksbyquicklyshowingphotosofdifferentfood.Allyou3______(has)todoisselectthephotosofhealthyfood.Thenyou4_____________(beableto)trainyourbraintoselecthealthyfoodinrealsituations.So,ifyou’reasugaraddictand5_________(able)tosaynotochocolateorcola,you6_____(have)betterdownloaditnow!daren’tneedn’thavewillbeabletoaren’tablehadCompletethepassagewithcorrectformsCompletethetipsforgoodtablemannerswiththecorrectformofthemodalsinActvity1.

(P7-3)WhilegoingonyourfirsttriptotheUKisexciting,newanddifferentcustomscanalsobeconfusing.Tablemannersarenoexception.Butdon'tworry-herearesome

tips:havetodarenothadbetterneedn’tbeableto完成句子1.Iwill_________________________inthreeyears.三年后我將能講英語。2.I'mafraidyou___________________suchathing.恐怕你不敢做這樣的事。3.DoI______________mytelephonenumberandaddress?我有必要把電話和地址留下嗎？4.Givenhishealthcondition，we_____________________________