SINGULAR AND PLURAL NOUNSREGULAR NOUNSMost singular nouns form the plural by aing -s!E"AMPLESSingular Pluralboat boatshouse housescat catsriver riversA singular noun ening in s, x, z, ch, sh ma#es the plural by aing-es!E"AMPLESSingular Pluralbus buseswish wishespitch pitchesbox boxesA singular noun ening in a $onsonant an then y ma#es the plural by ropping the y an aing-ies!E"AMPLESSingular Pluralpenny penniesspy spiesbaby babiescity citiesdaisy daisiesIRREGULAR NOUNS%here are some irregular noun plurals! %he most $ommon ones are liste belo&!E"AMPLESSingular Pluralwoman womenman menchild childrentooth teethfoot feetperson peopleleaf leavesmouse miceSingular Pluralgoose geesehalf halvesknife kniveswife wiveslife liveself elvesloaf loavespotato potatoestomato tomatoescactus cactifocus focifungus funginucleus nucleisyllabus syllabi/syllabusesanalysis analysesdiagnosis diagnosesoasis oasesthesis thesesSingular Pluralcrisis crisesphenomenon phenomenacriterion criteriadatum dataSome nouns ha'e the same form in the singular an the plural!E"AMPLESSingular Pluralsheep sheepfish fishdeer deerspecies speciesaircraft aircraft