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

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

后接動詞原形，表示某人做某事的能力，可用于大多數(shù)時態(tài)。beableto

用于過去時態(tài)時，可以表示“某人過去或當時成功地做了某事”。IfIworkharder,Iwillbeabletomakegreaterprogress.Therewasabigfire.Luckily,everyonewasabletoescape.Grammardarenotdosth.=beafraidtodosth.

dare作情態(tài)動詞時，

沒有人稱和數(shù)的變化，否定式是darenot，主要用于否定句、疑問句和條件從句中，一般不用在肯定句中。

dare

常用作實義動詞(即有實際意義的動詞，表行為、動作或狀態(tài)的詞，詞義完整)，有時態(tài)、人稱和數(shù)的變化。用在肯定句中，dare+帶to的不定式；用在否定句和疑問句中，dare+帶to/不帶to的不定式。Shedarenotgooutaloneatnight.Shedoesn’tdare(to)gooutaloneatnight.Grammarhaveto的含義與must相似，兩者往往可以互換使用，但haveto有各種時態(tài)，且強調(diào)客觀需要，意為“不得不”。否定形式是don’thaveto，相當于needn’t。haveto=benecessaryorgivestrongadvicetodosth.Therewerenobuses;wehadtowalkallthewayhome.Youdon’thaveto/needn’tbringagiftifyoudon’twantto.Grammarhadbetter

后接動詞原形，意為“最好”，

用于現(xiàn)在或?qū)頃r，可用于一切人稱，沒有任何詞形變化。hadbetter的否定式是在其后加not，疑問式是把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