*Unit2Noun(名词)*可数名词11.可数名词Alargenumberofcomets(彗星)arediscoveredeverycentury.AftersomanyKTVandrestaurantfires,Ithinkthatitissafertochooseoutdooractivities.*规则名词的复数形式2map—mapstale—talesbox—boxesbus—buseswatch—watchesdish—dishesfox—foxesappendix—appendixesindex—indexesboy—boysbaby—babiesstory—stories2.规则名词的复数形式（friends/students…）2.1+-s/-es2.2以ch、sh、x、s结尾→-s或-es2.3以元音+y结尾→-s，以辅音+y结尾→-ies*不规则名词的复数形式33.不规则名词的复数形式(foot→feet/child→children/sheep→sheep...)3.1以o结尾→-spiano—pianosradio—radiosmemo—memostango—tangosstudio—studiosratio—ratiosauto—autosdynamo(发电机)—dynamoskilo—kilos3.2以o结尾→-esecho—echoeshero—heroespotato—potatoescargo—cargoesNegro—Negroestomato—tomatoes*不规则名词的复数形式33.3以o结尾→-s/-eszero—zero(e)smosquito—mosquito(e)smotto—motto(e)svolcano—volcano(e)s3.4以oo结尾→-szoo—zoosbamboo—bamboosshampoo—shampoos*不规则名词的复数形式33.5以f或fe结尾→-vesleaf—leavesknife—kniveswolf—wolveshalf—halveslife—livesshelf—shelvesthief—thieveswife—wivesloaf—loaves3.6以f或ff结尾→-schief—chiefscliff—cliffsgulf—gulfsproof—proofssafe—safesbelief—beliefsroof—roofsgrief—griefsgiraffe—giraffestariff—tariffshandkerchief—handkerchiefs3.7以us结尾→-ifocus—focistimulus—stimulifungus(真菌)—funginucleus(核)—nucleiradius(半径)—radii*不规则名词的复数形式33.8以um/on结尾→-amedium—mediaphenomenon—phenomenabacterium—bacteriastadium—stadiamaximum—maximacurriculum—curriculacriterion—criteriagymnasium—gymnasiadatum—data3.9以ous结尾→-ice3.10名词→-enmouse—micelouse—li