"Matěj and František are good fathers."

Translation: Matěj a František jsou dobří otcové.

[filigree2]

Where does the "ove" ending come from? It is not in the noun-ending charts in the Families module.

[Jamie08MD]

The pattern muž has two possible endings in nominative plural. Some nouns can use both (with one of them preferred), some use only the "-i" ending and some (like "otec") use only "-ové" ending.

http://prirucka.ujc.cas.cz/?slovo=Muz

http://prirucka.ujc.cas.cz/?slovo=Otec

In this case "otci" would be colloquial, non-standard.

[filigree2]

Thank you for the explanation and the links.

[Anette896549]

Is "otce"accusative plural (as it's used in translating "We know your fathers"), and "otcové" nominative plural?

[VladaFu]

Yes.

[WendyGoldm2]

if "otci" is colloquial, then "Matěj a František jsou dobří otci" should be still accepted as a correct answer.

[VladaFu]

No, this course follows standard Czech and established dictionaries. Check http://prirucka.ujc.cas.cz/?slovo=otec

Colloquial Czech is often way too different, it is most often a special dialect Common Czech.

[Vladis238630]

You used the wrong word: Matěj a František jsou dobrými otci.
"dobrými" ???
i've used "dobří" as shown as an answer above and it said "the wrong word"

[chartsman]

"dobrymi" would be correct in Polish because we use the instrumental case after the verb "to be", I didn't know it existed in Czech as well.

[VladaFu]

Yes, it does exist, but is less common than in Polish.