"We do not have a father."
Translation:У нас нет папы.
it is the genitive case so nouns ending in a turn into ы and nouns ending in a consonant you add an a
У нас нет папы I still don't get the purpose of "У" I've read some explanations that makes sense for some sentence, but not in this one for example. Someone has any idea of the "У" the purpose in this sentence more specifically?