Where are the rules for forming plurals discussed?
I came across something that said we simply add an 's' to a word ending in 'y' to form the plural if there is a vowel preceding the 'y'. If there is a not a vowel before the 'y', it is changed to an 'i' and then we add 'es'.
Examples: donkey(s)
penny(ies)
Thanks for your help!
