PRONOUN

DEFINITION:A word which is used in place of a noun is called pronoun.
                       for example:He,she,they.

• He (this word is used to denote a boy)
• She(it is used in place of a girl)
• They(this word is used to tell about more than one people)
• We (this word is used to tell about the speaker and other people)
• You (this word denotes about the listener)
• I (this word tells about speaker)
• It (This word is used to tell about non living things)

SENTENCES:

• Ram is reading a book.
• He is reading a book.

In first sentence Ram is the name of a person it means this word is NOUN.
In second sentence He is used instead of RAM.