Say the correct plural form of the singular nouns. bag- potato- class-
Hi Aspirant,
singular noun refers to one person, place or thing we're as plural noun is a word that indicates that there is more than one person,animal place,thing or idea.
Correct plural form of bag is bags.
Plural form of potato is potatoes.
Plural form of class is classes.
This answer are according to grammatical rules of english.
Hope it helps you.