I can hear you can hear he can hear we can hear you can hear they can hear
V-ing form
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
I can have heard you can have heard he can have heard we can have heard you can have heard they can have heard
V-ing perfect
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
I can't hear you can't hear he can't hear we can't hear you can't hear they can't hear
V-ing form
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
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
V-ing perfect
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
can I hear? can you hear? can he hear? can we hear? can you hear? can they hear?
V-ing form
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
can I have heard? can you have heard? can he have heard? can we have heard? can you have heard? can they have heard?
V-ing perfect
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
can't I hear? can't you hear? can't he hear? can't we hear? can't you hear? can't they hear?
V-ing form
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
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?
V-ing perfect
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?