Breakdown of Nie mam wątpliwości, że on mówi prawdę.
on
he / it (m)
mówić
to speak
że
that
prawda
truth
nie mam wątpliwości
I have no doubt (nie mam wątpliwości, że...)
Questions & Answers about Nie mam wątpliwości, że on mówi prawdę.
Why does wątpliwość change to wątpliwości here?
The verb mieć (to have) normally takes the accusative case, but here it is negated (nie mam). In Polish, a negated direct object always takes the genitive case. For feminine nouns ending in a consonant like -ść, the genitive ending is -i.
Is wątpliwości singular or plural in this sentence?
It can be either! For feminine nouns ending in -ść, the genitive singular and the genitive plural are identical (wątpliwości). So this sentence translates equally well to "I have no doubt" and "I have no doubts".
Why is there a comma before że?
In Polish punctuation, you must always put a comma before the conjunction że (that) when it connects two parts of a sentence. English often drops the comma or the word "that" entirely, but Polish requires both.
Could I leave out the word on?
Yes, you could just say że mówi prawdę. Including on (he) isn't strictly necessary because the verb form mówi already shows it is third-person singular. Using on here just adds a little emphasis, or clarifies who you mean if multiple people were mentioned.
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