saya sudah mengerjakan pr selama 2 jam. dalam bentuk present perfect tense dan buat kalimat (+), (-) dan (?)

(+)i have been working my homework for 2 hours
(-) i dont have been working my homework for 2 hours
(-) did i been working my homework for 2 hours?

(+)i have done the homework for two hours.
(-)i haven't done the homework for two hours
(?)have i done the homework for two hours?