It is the first time that I see ilu instead of ile. Posłów is already genitive. What is the reason of that ilu?
"posłów" may be Genitive, but it's Accusative here (as needed by "znać"). And "ile" does change together according to it, so it's Accusative.
In Accusative, "ilu" is the masculine personal version and "ile" the not masculine-personal version.
Oh, right, posłów is accusative because is masculine personal :) I learned something important today about ile, thank you
Exactly. Analogous to that, men-only groups and mixed groups take masculine personal verbs and adjectives, whereas women-only groups take forms of the second (other) plural.
Here is an example for "The young members of parliament were working":
posły pracowali (masculine personal)
Młode posłanki pracowały (other)
EDIT: The plural of poseł is of course posłowie, as Jellei pointed out.
Several natives told me that they wouldn't use such phrase, no matter what country the conversation is about.
Thank you. English is not my native language, so I don't know all the nuances. These conversations are a great way to improve English while learning other languages too. Have some Lingots for all the help you gave me in this and other threads.
Why is it "Ilu" and not "ile"... Can you explain the difference between the two terms.
Numerals and some other verbs connected with them have separate forms for the 'masculine personal plural' (groups including at least one man). This is exactly that. As the word "poseł" is masculine, its plural is 'masculine personal', and uses this 'special' form.
Why isn't "How many parliament members do you know" not accepted? Im fluent in both English and Polish so I'm pretty sure that sentence is also valid