some, any, something, anything, etc..
some: In bevestigende zinnen of waar het antwoord al bekend is.(+) I have something to tell you.
(?) (je weet het antwoord al)
I see you have crisps. Can I have some crisps?
any: In vragen en ontkennende zinnen.
(-) I lost my keys. I can't find them anywhere!
(?) (je weet het antwoord niet)
Can I help you with anything?