楼主的意思就是谁是卧底作为主语。

　　您想表达的意思是不是谁是卧底这个游戏的规则。

　　如果我的猜测没错的话，那么就是WhoIsUndercover'srules

　　WhoIsUndercover谁是卧底这个专有名词。

　　’s的

　　rules规则

　　Whoisundercover.

　　Whoisthespy!

　　ThisgamewillhelpupracticetheskillofusingEnglishtodescribeathing.

　　8students,8cards(7ofthemisA,1ofthemisB,Bisthespy)forexample,AisORANGE,BisLEMON.

　　Everyonehasacardanddoesn’tletotherplayersknowwhatyouget.

　　Everyoneneedstosayawordorasentencetodescribewhatyougetinturns.Youcannotdirectlysaythewordyouget.Thepurposeofyourdescribingistomakeplayerswhohavethesamecardwithyouknowyouarenotthespy.Atthesametime,youcan’tmakethespyknowwhatyouget.What’smore,yourselfdon’tknowifyouarethespyornot.Ifyouarethespy,yourpurposeistomakeothersthinkyouareontheirside.Itmeansthatyouneedtomakeothersthinkyouhavethesamecardwiththemandthespyissomeoneelse.

　　Aftereveryonedescribesforaround,Iwillsaythree,two,one,andeveryonepointtosomeonewhoyouthinkisthespy.Whogetthemostvotesdie.

　　Ifthereareonly3playersalive,thespywins.Or,thespyloses.