Grammar (parts of sentence:

There are two parts of sentence.
Subject and predicate.
Subject(mazmoon):- To whom we talk about is called subject
e.g. Manan is a good boy. In this sentence, "Manan" is subject.
Predicate(khabar):- What we talk about subject is called predicate. e.g Manan is a good boy. In this sentence, "is a good boy" is predicate.