Unit 1 Laughter is good for you Grammar and usage 课件.ppt

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1、Unit1LaughterisgoodforyouGrammarandusageTheinfinitive,verb-ingandverb-edarecallednon-finiteverbs.Theycanfunctionasdifferentelementsinthesentence.Thetoinfinitiveandverb-ingformscanbeusedasthesubjectofasentence.Thetoinfinitiveandverb-ingformscanbeusedasthesubjectofasentence.Whenwetalkaboutagener

2、alidea,wesometimesusetheverb-ingformasthesubject.Toseeistobelieve.Laughinghelpsyourbodystayhealthyandcanevenhelpyoufightpain.Whenthesubjectisatoinfinitive,wecanusethepreparatorysubjectitatthebeginningofthesentence.Itisimportanttorespectpeople.Afterit’snouse/good,weoftenusetheverb-ingformasthere

3、alsubject.It’snousecryingoverspillmilk.It’snogoodworryingaboutit.Wecanusefor+objectpronounbeforethetoinfinitiveasitslogicalsubject.It’snecessaryformetoknowhowtousethecomputer.2.Non-finiteverbscanbeusedastheattributive.Whenusedastheattributive,thetoinfinitiveoftenreferstoanactionthatwillhappenin

4、thefuture,theverb-ingformoftenreferstoanactionthatcontinuing,andtheverb-edformoftenreferstoapastactionorexpressespassivemeaning.Ihavesomeletterstowrite.Themanperformingonstageisafamouscomedian.Johntookmanyphotosofleavesfallentotheground.In1975,GeorgeBurnsactedinafilmcalledTheSunshineBoys.Weuseb

5、eing+verb-edtoformthecontinuouspassive.Theundergroundsystembeingbuiltinthecitywillbeopennextyear.Whenthetoinfinitiveisusedastheattributive,thenounthatitmodifiesisoftenthelogicalobjectofthetoinfinitive.Sometimesthenouncanbeitslogicalsubject,orusedinapposition.WhenJackwasyoung,hehadnofriendstopla

6、ywith.Tomisoftenthefirstonetoarriveatschool.YoucanexpecttohearalotmorefromBillyCrystal–hehasnoplanstostopmakingfilms.3.Non-finiteverbscanbeusedastheobjectcomplementinthesentence.Inthiscase,thetoinfinitiveoftenreferstoanactionthatistakingplace,andtheverb-edformhaspassivemeaning.Weinviteyoutowatc

7、hourperformancetomorrowevening.Theycouldonlyseehimstandingtheremovinghislips.Aftergettingoffthestage,theactorfeltagreatweightliftedfromhim.AnswerstoexerciseAonpage91laughing2tounderstand3participating4produced5enjoying6readingAnsw