We use indefinite pronouns to refer to people and things when we do not know or do not need to mention who or what we are talking about.

1. We use somebody, someone and something in positive sentences. e.g. I saw somebody/someone/something in the house.

2. We use anybody, anyone and anything in negative sentences or in questions.

e.g. I did not see anybody/anyone/anything in the house.**Did you see anybody/anyone/anything in the house?

3. We use nobody, no one and nothing to refer to “not anyone” and “not anything”.

e.g. there is nobody/no one/nothing in the house.

4. We use everybody, everyone and everything to refer to “all people” and “all things”. e.g. Is everybody/everyone here today?

everything is ready.

When we are offering something or when we expect the answer to be “yes”, we can use something/somebody/someone in questions.

e.g. Would you like something to eat?

Is someone there?