Compound Subjects
A compound subject is two or more subjects with the
same predicate.
If a compound subject is made of two or more subjects,
use the word and to link them.
If a compound subject is made of three or more subjects,
use commas to separate them. You should also include the
word and before the last subject.
When a sentence has a compound subject, the verb and
subject should agree in number. If the subject is plural,
then the predicate needs to be plural.
Examples:
1. Bill ran down the hill. Joe ran down the hill. Bill and Joe
ran down the hill.
2. Sally went for a ride. Judy went for a ride. Mary went for
a ride. Sally, Judy, and Mary went for a ride.