Referring to unspecified people/things: someone, anything, nobody, everywhere
Indefinite pronoun + singular verb
No- pronouns are already negative; don't add 'not'
Any- pronouns in questions; some- for offers
💡 All indefinite pronouns take singular verbs: Everyone is here (not are).
✓Someone is at the door.
✗Someone are at the door.
Indefinite pronouns take singular verbs.
✓I don't know anyone here.
✗I don't know someone here.
Any- in negative sentences.
✓Nobody knows the answer.
✗Nobody don't know the answer.
Nobody is already negative.