A personal pronoun may be

• a subject pronoun or

• an object pronoun

A subject pronoun is used as the subject of a sentence.

• Singular subject pronouns like he, she, and it take singular verbs.

• Subject pronouns I, you, we, and they take plural verbs.

• The pronoun you is both singular and plural, but it is always followed by a plural verb.

A subject pronoun is used as the subject of a sentence.

Examples:

• My mother prepares our meals every day. She loves all of us.

• My friends do their homework every day. They want to have good grades.

The words she and they are subject pronouns.

They substitute for nouns used as subjects in sentences.

An object pronoun substitutes for a noun used as an object in a sentence.

Examples:

• My parents surprised me with a party.

• The agreement was between him and her.

The words me, him, and her are object pronouns. They follow verbs or prepositions in sentences.

Object pronouns have forms that differ from subject pronouns.

Me, him, her, us, and them are object pronouns.

The pronouns you and it can be used as subjects and objects in a sentence.

Examples:

1) You meet me tomorrow.

2) I will meet you tomorrow.

In the first sentence, you has been used as a subject pronoun.

In the second sentence, you has been used as an object pronoun.

The pronouns you and it can be used as subjects and objects in a sentence.

Examples:

3) It is an apple.

4) I eat it everyday.

Similarly, it in the third sentence has been used as a subject pronoun and it in the fourth sentence has been used as an object pronoun.

You and it have the same forms whether they are used as subjects or objects in sentences.