English verb conjugation
COULD OVERHEAR

Irregular verb: overhear - overheard - overheard

Affirmation

Simple form	V-ing form
I could overhear you could overhear he could overhear we could overhear you could overhear they could overhear	I could be overhearing you could be overhearing he could be overhearing we could be overhearing you could be overhearing they could be overhearing
Perfect	V-ing perfect
I could have overheard you could have overheard he could have overheard we could have overheard you could have overheard they could have overheard	I could have been overhearing you could have been overhearing he could have been overhearing we could have been overhearing you could have been overhearing they could have been overhearing

Negation

Simple form	V-ing form
I could not overhear you could not overhear he could not overhear we could not overhear you could not overhear they could not overhear	I could not be overhearing you could not be overhearing he could not be overhearing we could not be overhearing you could not be overhearing they could not be overhearing
Perfect	V-ing perfect
I could not have overheard you could not have overheard he could not have overheard we could not have overheard you could not have overheard they could not have overheard	I could not have been overhearing you could not have been overhearing he could not have been overhearing we could not have been overhearing you could not have been overhearing they could not have been overhearing

Interrogative form

Simple form	V-ing form
could I overhear? could you overhear? could he overhear? could we overhear? could you overhear? could they overhear?	could I be overhearing? could you be overhearing? could he be overhearing? could we be overhearing? could you be overhearing? could they be overhearing?
Perfect	V-ing perfect
could I have overheard? could you have overheard? could he have overheard? could we have overheard? could you have overheard? could they have overheard?	could I have been overhearing? could you have been overhearing? could he have been overhearing? could we have been overhearing? could you have been overhearing? could they have been overhearing?

Interro-negative form

Simple form	V-ing form
could I not overhear? could you not overhear? could he not overhear? could we not overhear? could you not overhear? could they not overhear?	could I not be overhearing? could you not be overhearing? could he not be overhearing? could we not be overhearing? could you not be overhearing? could they not be overhearing?
Perfect	V-ing perfect
could I not have overheard? could you not have overheard? could he not have overheard? could we not have overheard? could you not have overheard? could they not have overheard?	could I not have been overhearing? could you not have been overhearing? could he not have been overhearing? could we not have been overhearing? could you not have been overhearing? could they not have been overhearing?