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1、欢迎进入英语课堂Readthroughthisparagraphandunderlineallthepredicatives.1.Akangarookeptgettingoutofhisenclosureatthezoo.Knowingthathewasagoodjumper,thezooauthoritiesincreasedtheheightofthefencearoundhim,but,thenextmorning,thekangaroowasoutofhisenclosureagain.RevisingusefulstructuresSothekeepers’s
2、olutionwastobuildanevenhigherbarrier.However,thenextmorning,theresultwasdisappointing---thekangaroowasnotinhisenclosure.Theauthorities,beingdesperate,increasedtheheightofthefenceagainandagainanditwassoonoverfortymetershigh.Acamelinthenextenclosureaskedthekangaroo,“Howhighdoyouthinkthey’l
3、lgo?”Thekangaroosaid,“That'sagoodquestion.Itseemstome,they’lljustkeepgoinghigheruntilsomebodyrememberstoshutthegateatnight!”Underlinethepredicativesinthisconversationandthenpractiseitwithapartner.2.KIM:Themeatseemstobeshrinking!SAM:Maybethere’stoomuchfatinit.KIM:WhatcanIdo?SAM:I
4、t’sprobablythewrongkindofmeatforabarbecue.Thebestthingistocookitveryslowly.KIM:Youknow,itsmellsstrangetoo.SAM:Isitrotten?Let’ssmell.Hey!Thisisn’tsteak!KIM:So,whatisit?SAM:Wheredidyougetit?KIM:Itwasinthebottomofthefridge.SAM:Oh,no!That’sthedog'smeat!KIM:Areyousure?(一)动词不定式:作表语:My
5、jobistodrivethemtothepowerstationeveryday.动词不定式在系动词be之后作表语,与表示将来时的be+动词不定式结构有所区别,如:Ourplanistosetupanothermiddleschoolforthepeasants’children.我们的计划是给农民子弟再成立一所中学。(句中的谓语动词为is,动词不定式tosetup…为表语,主语为plan,但plan并不是动词不定式的逻辑主语,即动词不定式tosetup所表示的动作不是主语plan产生的。)(句中的aretosetup整个结构为句中谓语,主语为we,同时也是动词不定式
6、tosetup所表示的动作的逻辑主语,即动词不定式tosetup所表示的动作是由we产生的)。疑问词+动词不定式:疑问代词和疑问副词后可加动词不定式构成不定式短语,在句中可表语如:Theproblemishowtopreventthemfromswimminginthisriver.Thequestionwaswheretogetthemedicineneeded.2.-ing形式Herjobiswashingandcooking.Myhobbyiscollectingstamps.作表语:-ing形式与动词不定式在句中作主语、表语、宾语时的区别。一般说来,表示一个比较
7、抽象或泛指的动作时多用
