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非谓语动词形式：主动语态被动语态不定式：todoTohavedoneTobedoingTohavebeendoingTobedoneTohavebeendone动名词:DoingHavingdoneHavingbeendoneBeingdoneHavingbeendone分词：现在分词:beingdoneHavingdoneHavingbeendoingBeingdoneHavingbeendone过去分词:Done1.Thereisnothingtoworryabout.2.Thereisnotimetohesitate.3.Tosavetheearth,wemustpreventtheearthfrombeingpolluted.4.Shelefthome,nevertoreturnagain.5.Totellyouthetruth,IhaveneverbeentoBeijing.6.Noneisallowedtosmokeinthewaitingroom.7.Afterfinishingthejob,hewenthome.8.Hewasblamedforhavingdonesomethingwrong.9.Alittlechildlearningtowalkoftenfalls.10.Themenworkinghereareallfromtheruralareas.11.Climbingtothetopofthetower,wesawamagnificentview.12.Hewentoutshuttingthedoorbehindhim.13.Whenleavingtheairport,theywavedagainandagaintous.14.Beingsick,Istayedathome.15.Shecaughtcoldsittingonthegrass.16.Turningtotheright,youwillfindapathleadingtohiscottage.17.Admittingwhatshehassaid,Istillthinkthatshehasn’ttriedherbest.18.Itrainedfortwoweeksonend,completelyruiningourholiday.19.Heated,themetalsexpand.20.Overcomewithsurprise,shewasunabletoutteraword.21.Givenmoretime,Iwilldoitbetter.22.Consideredasabuildingmaterial,woodisnotverystrong.23.Badlyinvolvedintheaccident,thecarisstillrunning.24.Weweresurprisedathisnotpassingtheexam.25.Hepridedhimselfonhavingneverbeenbeatenatchess.26.Thedecisionhavingbeenmade,whatistobedonenowishowtocarryitout.27.Iwasoverjoyedatthenewsofmyhometownhavingmadesomuchprogress.28.Thatthebrain,oncedeprivedofoxygen,dieshasbeenproved.