The subject: The naming part
The subject of a sentence is who or what the sentence is about. The subject is a noun. A noun is any person place or thing.
Example: The dog runs down the street.
The dog is the subject. This is what the sentence is about.
The predicate: The telling part
The predicate of a sentence tells what the subject is doing. It will start with a verb and contain the object.
Example: The dog runs down the street. : Runs down the street is the predicate.