A singular noun is a noun that names one thing.
dog
cat
ball
book
A plural noun names more than one thing. Make a plural noun by adding –s to the end of the noun.
dogs
cats
balls
books
Here’s how we use a singular noun in a sentence.
I found a dog in my driveway.
This sentence has a plural noun:
I saw two dogs in my yard.
A singular noun names one thing. A plural noun names more than one thing. Add –s to most nouns to make them plural.