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 cannot hear you cannot hear he cannot hear we cannot hear you cannot hear they cannot hear
V-ing form
I cannot be hearing you cannot be hearing he cannot be hearing we cannot be hearing you cannot be hearing they cannot be hearing
Perfect
I cannot have heard you cannot have heard he cannot have heard we cannot have heard you cannot have heard they cannot have heard
V-ing perfect
I cannot have been hearing you cannot have been hearing he cannot have been hearing we cannot have been hearing you cannot have been hearing they cannot 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 I not hear? can you not hear? can he not hear? can we not hear? can you not hear? can they not hear?
V-ing form
can I not be hearing? can you not be hearing? can he not be hearing? can we not be hearing? can you not be hearing? can they not be hearing?
Perfect
can I not have heard? can you not have heard? can he not have heard? can we not have heard? can you not have heard? can they not have heard?
V-ing perfect
can I not have been hearing? can you not have been hearing? can he not have been hearing? can we not have been hearing? can you not have been hearing? can they not have been hearing?