Plurals
PLURALS noun +Scatsdaysrosesbooks
nouns ending in ssschshx+ esbuseskisseschurches bushes boxes
nouns ending in o+ espotatoes tomatoes heroes negroesBUT kilos photos pianos
nouns ending in consonant + yy i+ esfliescountriescities berries dutiesBUT boys monkeys keys
nouns ending in f(e)+ esleaveswiveshalves knives wolvesBUT roofs chiefs handkerchiefs
IRREGULAR PLURALS man men woman womensnowman snowmenfoot feettooth teethgoose geesemouse micechild childrensheep sheep
Sources http://www.google.ru/search?hl=ru&rlz=&q=plurals&um=1&ie=UTF-8&tbmhttp://en.wikipedia.org/wiki/Plural#Englishhttp://www.bbc.co.uk/skillswise/words/spelling/plurals/pluralrules/worksheet1.shtmhttp://www.bbc.co.uk/skillswise/words/spelling/plurals/pluralrules/worksheet.shtmlhttp://grammar.ccc.commnet.edu/grammar/plurals.htm