"Já vašeho chlapce znám."

Translation: I know your boy.

[ingmar65536]

Reminds me of Yoda's word order: I your boy know ;-)

[Leo_Alshafei]

Exactly!

[PhilCostin]

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...

[kacenka9]

Not sure if you read the rule but 'vašeho' is singular. If it was plural, the sentence would be

Já vaše chlapce znám.

[PhilCostin]

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

[raynovember]

does this also mean I know your son, or I know your boyfriend?

[ArsinoeLC]

Same question :)

[VladaFu]

Could mean both.

[smoaking]

is "vaseho chlapce" genitive here? if not or if so, could you please explain?

[ion1122]

It is accusative. (The word is "vašeho", not "vaseho".) It is the direct object of the verb.

[hkm_souza]

The hover text says that "chlapce" translates to both "boy" or "boys". What indicates if the speaker means the singular case or the plural?

[ion1122]

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.

[petic]

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.