"You have a good staff."

Translation: Macie dobry personel.

[immerweiter]

why is here dobry but not dobrego?

[immery]

personel is not animated.(as can be seen by macie dobry pesonel, nie macie dobrego personelu) Do not ask why. I do not know.

[immerweiter]

does that mean i use dobrego when i need genitiv with negation?

[immery]

yes, dobrego is genitive masculine, and accusative for masculine animated.

[obado]

Hmm - an English speaker needs to go through the English sentences!