They are building blocks. noun. pronoun. verb , adverb,adjective,conjunction, interjection. they have different functions. all together give meaning to sentences.
Examples: Bushra is smart.
1: bushra> noun .
2:smart>adjective .
3: I run fast> fast>adverb.
4:YUM!>interjection.
5:I eat lunch>eat>action verb.
6:I and you.> and>conjunction.
7:she is tall>she> pronoun.
8: I am on the elevator>on> preposition.
