Nouns can be classified as
singular or plural. A noun that specifies one person or thing is singular.
For
example: boy, child, bird, tree, pen, potato.
Consider the following
sentence:
The bird
flew through the window and out the door before returning to its nest.
In the above sentence,
“bird”, “window”, “door”, and “nest” are all singular nouns.
A noun that specifies more
than one person or thing is plural.
For
example: boys, children, birds, trees, pens, potatoes.
Consider the following
sentence:
The sea
lions swam away to the caves before the sharks could get to
them.
In the above sentence, “sea
lions”, “caves”, and “sharks” are all plural nouns.