How do we know whether chlapce is plural or singular here? Is vašeho singular? There is a chance I read the rule and forgot it...
Not sure if you read the rule but 'vašeho' is singular. If it was plural, the sentence would be
Já vaše chlapce znám.
Thanks! Yes, I read the rule but forgot for a moment. I will try to re-read that next time! I am enjoying this course by the way, thanks for working on it :D
is "vaseho chlapce" genitive here? if not or if so, could you please explain?
It is accusative. (The word is "vašeho", not "vaseho".) It is the direct object of the verb.
The hover text says that "chlapce" translates to both "boy" or "boys". What indicates if the speaker means the singular case or the plural?
hkm_souza, the adjective in front of the noun will usually tell you if the noun is singular or plural, because the adjective will take either singular or plural endings.
In this case vašeho clearly marks it as singular accusative. In other sentences it could be a similar adjective, otherwise context should help to determine if chlapce is singular or plural.