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 couldn't overhear you couldn't overhear he couldn't overhear we couldn't overhear you couldn't overhear they couldn't overhear	I couldn't be overhearing you couldn't be overhearing he couldn't be overhearing we couldn't be overhearing you couldn't be overhearing they couldn't be overhearing
Perfect	V-ing perfect
I couldn't have overheard you couldn't have overheard he couldn't have overheard we couldn't have overheard you couldn't have overheard they couldn't have overheard	I couldn't have been overhearing you couldn't have been overhearing he couldn't have been overhearing we couldn't have been overhearing you couldn't have been overhearing they couldn't 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
couldn't I overhear? couldn't you overhear? couldn't he overhear? couldn't we overhear? couldn't you overhear? couldn't they overhear?	couldn't I be overhearing? couldn't you be overhearing? couldn't he be overhearing? couldn't we be overhearing? couldn't you be overhearing? couldn't they be overhearing?
Perfect	V-ing perfect
couldn't I have overheard? couldn't you have overheard? couldn't he have overheard? couldn't we have overheard? couldn't you have overheard? couldn't they have overheard?	couldn't I have been overhearing? couldn't you have been overhearing? couldn't he have been overhearing? couldn't we have been overhearing? couldn't you have been overhearing? couldn't they have been overhearing?