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1、动词不定式动词不定式的基本形式是“to+动词原形“,有时可以不带to.动词不定式没有人称和数的变化,在句子中不能作谓语。在句中可以作主语、表语、宾语、宾语补足语、定语和状语。构成：to+do(动词原形)用法：1.用作宾语(v.+todo)Iwanttobuyacomputer.Shehopestofindabetterjob.Iwishtogowithyou.needtodolearntodoagreetodoplantododecidetodorefusetodobegintodostarttodotrytodoforgett
2、odoremembertodoliketodoStoptodogoontodo2.用作宾语补足语：(v.+sb.+todo)Sheaskedmetohelpher.Theteachertoldhimtocomeontime.Edison’smothertaughthimtoreadandwrite.wantsb.todowishsb.todogetsb.todoordersb.todofindsb.tobelikesb.todowouldlikesb.todohelpsb.todo作宾语补足语不带to的情况：Letmedoit.
3、Isawhimcrossthestreet.常见动词有：使役动词:let,make,have感官动词:see,watch,hear,feel,listento比较：Iheardhersinginginthenextroom.Iheardhersinginthenextroom.3.用作状语(adverbial)：HecametoshowmehisnewCDplayer.(目的)Iwenttheretoseemyteacher.(目的)ShecamebacktogetherEnglishbook.(目的)Theboywastoof
4、rightenedtomove.(结果)4.用作主语TobehereatChristmastimeismydream.2.Togoabroadishisdream.3.Tosayiseasy,todoisdifficult.(这时可将其用形式主语it来替换)→ItismydreamtobehereatChristmastime.→Itishisdreamtogoabroad.→Itiseasytosay,itisdifficulttodo.5.用作表语Hisworkistofeedtheanimals.Herjobistoloo
5、kafterthepatients.Mywishistobeascientist.Givemesomethingtodrink.Ihavetwobookstoread.Theyhavemuchfoodtoeat.Heaskedforaroomtolivein.Idon’thaveapentowritewith.Theiceishardenoughtoskateon.Heboughtatoytoplaywith.6.用作定语(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)7.疑问词who,what,which,wh
6、ere,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.(主语)Idon’tknowwhattodo.(宾语)Hecantellyouwheretogetthebook.(宾语补足语)Thequestioniswho(m)toask.(表语)比较(Compare)Idon’tknowwhattodo.Idon’tknowhowtodoit.Idon’tknowwhattodoaboutit.非谓语动词(动词不定式和动词-ing形式)
7、中考考查重点讲解e.g.1.Hehaspromisedtobehavebetterlater.2.Theboydecidednottobecomeasailor.3.Ihopetogotocollege.promise,decide,hope,agree,choose,fail,wish,learn+todosth.I.4.Heagreedtohelpus.5.Shechosetostudychemistry.6.Hefailedtopersuadehim.7.Doyouwishtoeatalone?enjoy,finish,k
8、eep,mindsuggest,can’thelpe.g.1.他对听音乐总是兴致勃勃。Healwaysenjoyslisteningtomusic.2.我打扫完房间了Ihavefinishedcleaningtheroom.3.你不能像这样老变主意。Yousho
