what if there is a vowel before the y? in that case, add -s to form the plural.
➤ if a noun ends in -f, often change f to v and add -es.
➤ often nouns that end in -f, just need -s to form the plural.
➤ for some words that end in -f, the plural can be spelt in two different ways.
➤ with some words that end in -fe, change f to v and add -s.
* but only add -s to giraffe to form the plural.
➤ if a noun ends in -o, just add -s to form the plural.
➤ but with some nouns that end in -o, add -es to form 