I have bought a new dress.
You have studied the lesson.
He has broken the window.
She has lost the keys.
Have I bought a new dress?
Have you studied the lesson?
Has he broken the window?
Has she lost the keys?
I have not bought a new dress.
You have not studied the lesson.
He has not broken the window.
She has not lost the keys.
Espero que esto te ayude :)
