English verb conjugation
COULD OVERHEAR

Irregular verb: overhear - overheard - overheard

Affirmation

Simple form	V-ing form
I could overhear you could overhear she could overhear we could overhear you could overhear they could overhear	I could be overhearing you could be overhearing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she overhear? could we overhear? could you overhear? could they overhear?	could I be overhearing? could you be overhearing? could she 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 she 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 she 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 she 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 she 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 she 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 she have been overhearing? couldn't we have been overhearing? couldn't you have been overhearing? couldn't they have been overhearing?