Singular means one. The girl sat on the chair. This is
a singular sentence because there is only one
girl and one chair.
Plural means two or more. The girls sat on the chairs.
This is a plural sentence because there are two or more
girls sitting on two or more chairs.
You need to be very careful when changing sentences into plural
or singular. Look carefully at these examples and see if you
can spot what else has changed:
Singular: The girl was playing with her friend.
Plural: The girls were playing with their friends.
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