Questions & Answers about Potrzebuję siedemdziesięciu złotych.
A word-for-word breakdown is:
- potrzebuję = I need
- siedemdziesięciu = seventy (in a declined form)
- złotych = złoty / zlotys in the form used here
So the whole sentence means I need seventy zlotys.
A more literal gloss would be something like I need of-seventy of-zlotys, because Polish uses cases here where English does not.
Potrzebować is the dictionary form, meaning to need.
In the sentence, you need the conjugated form:
- potrzebuję = I need
This is:
- 1st person singular
- present tense
So:
- potrzebuję = I need
- potrzebujesz = you need
- potrzebuje = he/she/it needs
Polish verbs usually change their endings depending on the person, so you cannot normally leave them in the dictionary form in a sentence like this.