"Are you a boy?"

Translation: Czy jesteś chłopcem?

[Aichatr]

Is it okay to only say "Jesteś chłopcem?"

[immery]

yes, you can skip "czy" in questions, and you can always skip "ty".

Keep in mind that using "czy" makes a question more clear, especially if you are not a native speaker and have trouble with pronounciation.

[symphony.ali]

Maybe someone asked before, but what is the difference between "chłopcem" and "chłopakiem"? Thanks in advance :)

[Jellei]

They are both Instrumental forms, so let's rather discuss the Nominative, basic forms.

The difference between "chłopiec" and "chłopak" is a matter of age. "chłopiec" is a younger boy, "chłopak" is older. But there's no set border, it's a subjective thing. Personally I'd say that "chłopiec" should 'end' not later than 12-13. Rather earlier.

Also, "chłopak" means "boyfriend", if it's "someone's chłopak".

[Lt_Serebryakov]

What case is boy in?

[Jellei]

Instrumental.

[deactivated user]

Can you use "to" here?

[Jellei]

No. You can't use the "to" construction if on its left side you have a pronoun ("Czy ty to chłopiec?" sounds quite bad).

[juraj.slavik]

Is correct even the sentence (not the translation) with the word order: "Czy nie jestes chlopcem?" (if we expect the person is a boy)?

[Jellei]

It's unusual, but a correct sentence. It's like "Aren't you a boy?" (I was almost sure you're boy, was I wrong?).