Questions & Answers about Nie mam siostry, ale ufam sąsiadce.
Why do we use sąsiadce instead of sąsiadkę here?
In Polish, the verb ufać (to trust) requires the Dative case. This is different from English, where "trust" takes a direct object (which would usually translate to the Accusative case in Polish). Because of the verb ufać, we must use the Dative form of the noun.
How exactly does sąsiadka turn into sąsiadce?
For feminine nouns ending in -ka, the k changes to a c before adding the Dative ending -e. This is why the base word sąsiadka (female neighbor) becomes sąsiadce. You will see this same pattern in words like matka (mother) changing to matce.
Why is it nie mam siostry and not nie mam siostrę?
The verb mieć (to have) normally takes the Accusative case (which would be siostrę). However, when a verb is negated, a standard Polish grammar rule forces the object into the Genitive case instead. Therefore, we have to use the Genitive form siostry.
Can I use sąsiadce if my neighbor is a man?