The easiest way to make a singular noun plural is to add “s.”
Exception #1: Add “es” to a noun ending in “s,” “x,” “z,” “ch,” or “sh.”
Exception #2: Add “ies” to a noun ending in a consonant plus “y.”
Exception #3: Some plural nouns are irregular, and you have to memorize them. Here are some examples:
Exception #4: Some nouns sound plural, but they are actually singular.
Mathematics is my favorite subject.
The local news is covering the story tonight.
The team is meeting for pizza after the game.
Exception #5: Some plural nouns seem like singular items, but they actually take a plural verb.
My jeans are frayed and dirty.
My glasses are foggy.