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1、非谓语动词ppt非谓语动词特征：1）无人称和数的变化。2）不失去原意，可以加上自己的宾语或状语，构成非谓语动词短语。3）否定式不用借助于助动词在谓语动词前加not另外还有一些非动词的特征，相当于名词、形容词等，在句子里可以作这些词类所能用作的句子成分非谓语动词在句中不能单独作谓语动词。不受主语的人称和数的限制。Helikestosing.Theyliketosing.Themanwalkinginfrontwascarryingabook.Themenwalkinginfrontwerecarryingbooks
2、.非谓语动词主宾表定状宾补TododoingDoingdone∨∨∨∨∨∨∨∨∨∨∨∨∨∨tododoingdoing(分词)tobedonebeingdonebeingdonetohavedonehavingdonehavingdonetohavebeendonehavingbeendonehavingbeendonetobedoingtohavebeendoing过去分词只有一种形式done既可以表被动也可以完成1todo短语作主语Tofinishtheworkintenminutesisveryhard.
3、动词不定式短语作主语时，常用it作形式主语，真正的主语不定式置于句后，例如上面两句可用如下形式：Itisveryhardtofinishtheworkintenminutes.Itmeansfailuretoloseyourheart.常用句式有：1、It+be+名词+todo。2、Ittakessb.+sometime+todo。3、It+be+形容词+ofsb+todo。4、It+be+形容词+forsb.+todo。常用careless,,clever,good,foolish,honest,kind,la
4、zy,nice,right,silly,stupid,wise,等表示赞扬或批评的形容词，不定式前的sb.可作其逻辑主语。例如Todo作主语Totalkwithherisagreatpleasure.Tolearnfromothersisveryimportant.Itisagreatpleasuretotalkwithher.Itisveryimportanttolearnfromothers.2.作表语Herwishistobecomeafamoussinger.Ourplanistofinishthewor
5、kintwoweeks.3.作宾语Hewishestogoabroadtohaveafurtherstudy.Wehavedecidedtogivethemahand.IwanttowatchTV.常与不定式做宾语连用的动词有：want,hope,wish,offer,fail,plan,learn,pretend,refuse,manage,help,agree,promise,prefer,IwasthefirstwomantotravelaloneattheNorthpole.Shanghaiisthefi
6、rstcityintheworldtohavebuiltahigh—speedmaglevtrain.4.作定语5Todo作状语①表目的：Heworkeddayandnighttogetthemoney.Shesoldherhairtobuythewatchchain.注意不定式放句首时，逻辑主语与句子主语要一致：wrong：Tosavemoney,everymeanshasbeentried.right：Tosavemoney,hehastriedeverymeans.②表结果：Hearrivedlatetof
7、indthetraingone.常用only放在不定式前表示强调：Ivisitedhimonlytofindhimout.Afewyearslaterhecamehometofindhishometownchanged.Ihurriedtothepostoffice,onlytofinditwasclosed.③表原因：Theywereverysadtohearthenews.④表程度：It'stoodarkforustoseeanything.Thequestionissimpleforhimtoanswer.
8、6.作宾补在复合宾语中，动词不定式可充当宾语补足语，如Iwantyoutowashthecar.下动词常跟这种复合宾语：want,wish,ask,tell,order,beg,permit,help,advise,persuade,allow,prepare,cause,force,callon,waitfor,invite.Herwonderfulcareerinsp
