Negation in conversation

Refuse politely, say you do not understand, and use common negative verbs.

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Waiter

Dáte si kávu?

Would you like coffee?

You

Nie, ďakujem. Nemám teraz čas.

No, thank you. I do not have time now.

Waiter

Rozumiete menu?

Do you understand the menu?

You

Nerozumiem. Nie je to pre mňa.

I do not understand. It is not for me.

Nie, ďakujem.

No, thank you.