English verb conjugation
COULD HEAR

Irregular verb: hear - heard - heard

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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