something / anything = iets not … anything = niets
He is eating something. (Bevestigend)
somebody / anybody = iemand not … anybody= niemand
He doesn't know anybody. (Ontkennend)
someone / anyone= iemand not … anyone= niemand
I haven't seen anyone. (Ontkennend)
somewhere / anywhere= ergens not … anywhere= nergens
Do you want to go somewhere? (Vragend)