英语人教版九年级全册The review of the infinitives.ppt

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1、RevisionTheinfinitive动词不定式定义：不定式的构成是to+动词原形，当然to有时也可以省略。动词不定式没有人称和数的变化，可以担当除谓语外的任何句子成分。构成：to+do(动词原形)用法：1、用作宾语(v.+todo)e.g:Iwanttobuyacomputer.Shehopestofindabetterjob.Iwishtogowithyou.Ifounditdifficulttofallasleep.我发现很难入睡。needtodolearntodoagreetodostoptodoplantododecidetodogoontodotryto

2、dobegintodostarttodorefusetodoliketodoforgettodoremembertodo2.用作宾语补足语：(v.+sb.+todo)Sheaskedmetohelpher.Theteachertoldhimtocomeontime.Edison’smothertaughthimtoreadandwrite.wantsbtodowishsbtodogetsbtodoordersbtodofindsbtobelikesbtodowouldlikesbtodohelpsbtodo3.用作状语(adverbial)：Hecametoshowme

3、hisnewCDplayer.Iwenttheretoseemyteacher.ShecamebacktogetherEnglishbook.Theboywastoofrightenedtomove.(目的)(目的)(目的)（结果）It与不定式：动词不定式可以做主语，但如果动词不定式太长，显得头重脚轻的，那么我们就可用形式主语it代替，而把真正主语(即不定式)放于句尾。e.g:ItisnotdifficultformetostudyEnglishwell.对我来说学好英语不难。4.用作主语1.Togoabroadishisdream.2.Tosayiseasy,todo

4、isdifficult.（不定式作主语时可将其用形式主语it来替换）Itishisdreamtogoabroad.Itiseasytosay,itisdifficulttodo.5.用作表语Hisworkistofeedtheanimals.Herjobistolookafterthepatients.Mydreamistobeascientist.6.用作定语Givemesomethingtodrink.Ihavetwobookstoread.Theyhavemuchfoodtoeat.（这时不定式与被修饰词有动宾关系。若是不及物动词，介词不能省略）Heaskedfo

5、raroomtolivein.Idon’thaveapentowritewith.Theiceishardenoughtoskateon.Heboughtatoytoplaywith.7.疑问词who,what,which,where,when,how加todo可构成不定式短语，在句中可用作主语、宾语、宾语补足语、表语等。Whentostarthasnotbeendecided.Idon’tknowwhattodo.Hecantellyouwheretogetthebook.Thequestioniswho(m)toask.(主语)(宾语)(宾补)(表语)Idon'tk

6、nowhowtouseacomputer.(宾语)too...to太...以致于不能...enoughto足以...Theboxistooheavyformetolift.这个箱子太沉了，我提不动。Heisoldenoughtogotoschool.他到上学的年龄了。特殊用法1、wouldrather，hadbetter后。eg:Youhadbetterstayathome.2、Why.../Whynot...后。e.g：WhynothaveagoodrestonSunday?为什么星期天不好好休息一下呢?3、使役动词let,have,make等后接不定e.g:Leth

7、imgo!让他走!不定式省to有四种情况：4、感官动词:see,watch,lookat,hear,listento,smell,feel,find等后作宾补，省to。如：Isawhimdance.我看见他跳舞。（其中help的to可省可不省）e.g:Letmedoit.e.g:Isawhimcrossthestreet.比较：Iheardhersinginginthenextroom.（强调正在）Iheardhersinginthenextroom.（强调全过程）注意：这些情况在被动句中可千万不可省to哟！（被动语态中，“to”要还原）