Pronouns
Pronouns are small words that take the place of a noun. We can use a pronoun instead of a noun. Pronouns are words like: he, you, ours, themselves, some, each... If we didn't have pronouns, we would have to repeat a lot of nouns. We would have to say things like:
Do you like the president? I don't like the president. The president is too pompous.
With pronouns, we can say:
Do you like the president? I don't like him. He is too pompous.