"Ci mężczyźni widzieli białego konia."

Translation: These men saw a white horse.

[conor.raff]

Hmm, past tense doesn't seem to bad, only 4 really irregular verbs, and all the main ones like "mieć" and "być" are regular!

Makes up for the the case system being a "być" I suppose :)

[zagadka314]

Which ones are really irregular?

[eMzy7Q]

If this lesson is all about past perfect, why is everything translated into simple past?

[alik1989]

All the skill names in this course refer to Polish categories, not to English ones.
The name of this particular skill is a rather unlucky abbreviation of "past perfective".
The Polish equivalent of past perfect is very rare and not used in everyday speech, so it's also not taught in this course.

[eMzy7Q]

I see. Thank you very much.