English verb conjugation
CAN HEAR

Irregular verb: hear - heard - heard

Affirmation

Simple form	V-ing form
I can hear you can hear he can hear we can hear you can hear they can hear	I can be hearing you can be hearing he can be hearing we can be hearing you can be hearing they can be hearing
Perfect	V-ing perfect
I can have heard you can have heard he can have heard we can have heard you can have heard they can have heard	I can have been hearing you can have been hearing he can have been hearing we can have been hearing you can have been hearing they can have been hearing

Negation

Simple form	V-ing form
I can't hear you can't hear he can't hear we can't hear you can't hear they can't hear	I can't be hearing you can't be hearing he can't be hearing we can't be hearing you can't be hearing they can't be hearing
Perfect	V-ing perfect
I can't have heard you can't have heard he can't have heard we can't have heard you can't have heard they can't have heard	I can't have been hearing you can't have been hearing he can't have been hearing we can't have been hearing you can't have been hearing they can't have been hearing

Interrogative form

Simple form	V-ing form
can I hear? can you hear? can he hear? can we hear? can you hear? can they hear?	can I be hearing? can you be hearing? can he be hearing? can we be hearing? can you be hearing? can they be hearing?
Perfect	V-ing perfect
can I have heard? can you have heard? can he have heard? can we have heard? can you have heard? can they have heard?	can I have been hearing? can you have been hearing? can he have been hearing? can we have been hearing? can you have been hearing? can they have been hearing?

Interro-negative form

Simple form	V-ing form
can't I hear? can't you hear? can't he hear? can't we hear? can't you hear? can't they hear?	can't I be hearing? can't you be hearing? can't he be hearing? can't we be hearing? can't you be hearing? can't they be hearing?
Perfect	V-ing perfect
can't I have heard? can't you have heard? can't he have heard? can't we have heard? can't you have heard? can't they have heard?	can't I have been hearing? can't you have been hearing? can't he have been hearing? can't we have been hearing? can't you have been hearing? can't they have been hearing?