Unit(1)FoodforThoughtUsinglanguage课件高一英语

Book2Unit1FoodforthoughtUsinglanguagea...Iwasabletoholdaknifeandfork-andchopsticks!bButtherearestillsomedishesthatDaddarenottryevenaftermanyyearsofmarriagetomymother.c...MumandIjusthavetofindawaytogethimintothekitchen!d...we’dbetternoteattoomuchroastfoodasitmaymakeussufferfromheatinsideourbodies,...e“Youneedn’ttryitifyoudon’twantto,”Mumsaid,...Lookatthesentencesfromthereadingpassage.Thinkandworkoutthemeaningsofthewordsunderlined.Activity1What'sthemeaningoftheunderlinedwords?Modalverbs(情态动词)

canbeusedtoexpressthespeaker’smeaningofability,possibility,permission,andadvice,etc.beafraidtodosthhavetheabilitytodosthbenecessaryorgivestrongadvicetodosthgiveadvicetodoornottodosthnotbenecessarytodosthNowlet’sfocusonmoreexamples.Modalverbsbeabletodare＆needhavetohadbetterGrammarbeabletodosth.=havetheabilitytodosth.beableto

后接动词原形，表示某人做某事的能力，可用于大多数时态。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”。IfIworkharder,Iwillbeabletomakegreaterprogress.Therewasabigfire.Luckily,everyonewasabletoescape.Grammardarenotdosth.=beafraidtodosth.

dare作情态动词时，

没有人称和数的变化，否定式是darenot，主要用于否定句、疑问句和条件从句中，一般不用在肯定句中。

dare

常用作实义动词(即有实际意义的动词，表行为、动作或状态的词，词义完整)，有时态、人称和数的变化。用在肯定句中，dare+带to的不定式；用在否定句和疑问句中，dare+带to/不带to的不定式。Shedarenotgooutaloneatnight.Shedoesn’tdare(to)gooutaloneatnight.Grammarhaveto的含义与must相似，两者往往可以互换使用，但haveto有各种时态，且强调客观需要，意为“不得不”。否定形式是don’thaveto，相当于needn’t。haveto=benecessaryorgivestrongadvicetodosth.Therewerenobuses;wehadtowalkallthewayhome.Youdon’thaveto/needn’tbringagiftifyoudon’twantto.Grammarhadbetter

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。hadbetter的否定式是在其后加not，疑问式是把had和not提前。hadbetter=giveadvicetodoornottodosth.You’dbetterthinktwicebeforemakingdecisions.You’dbetternotgiveupthechancetobepromoted.Hadyoubettercomehereearlytomorrow?Hadn’twebetterwaituntilhecome?Practicebeableto,can,dare,must,need,haveto,hadbetter1.ItisraininghardandI

stayathome.2.Heistallerthanyouandhe

reachtheapplesonthetree.3.Myfriendtellsmethathe

nottryspicyfood.4.Asstudents,we

workhardatourlessons.5.Therailwaystationisverynear.You

nottakeataxi.6.You__________noteattoomuchsugarandit’sbadforyourteeth.7.IamgoodatEnglish,andI____________talkwithpeopleinEnglisheasily.8.WhenIwasfiveyearsold,I_____________speakalittleEnglish.havetocan/isableto

daremustneedhadbettercan/amabletocould/wasabletoUnderlinethemodalsintheintroductiontoanappandtalkabouttheirmeanings.(P6)1.beafraidtodosth.2.notbenecessarytodosth.3.benecessarytodosth.4.havetheabilitytodosth.5.don’thavetheabilitytodosth.6.give