Subject

A subject is the main idea of a sentence. It is usually made of a noun or noun phrase. It is what the sentence is about.
For example: Phil is tall.
"Phil" is the subject of the sentence.
"Phil" is a proper noun, the name of a person.

A sentence can also have more than one subject.
For example: The man and his wife are moving to New York.
This sentence has two subjects.
One subject is "the man".
The other subject is "his wife".

When a sentence has more than one subject, we call it a compound subject.

You may go back to the description of parts of the sentence or on to the next page about predicates.