Why is it that the CZ-EN dictionaries (at least the two I'm using, i.e. Fronek and Lingea) don't tell you whether, if a verb is followed by "koho", it's genetive or accusative? ptát se koho na co: koho is apparently genetive, but the dictionaries don't seem to give any clue about this. tázat se koho na co, žádat koho o co: is koho genetive or accusative here? I have no idea. :?