English verb conjugation
COULD VENT

Regular verb: vent - vented - vented

Affirmation

Simple form	V-ing form
I could vent you could vent he could vent we could vent you could vent they could vent	I could be venting you could be venting he could be venting we could be venting you could be venting they could be venting
Perfect	V-ing perfect
I could have vented you could have vented he could have vented we could have vented you could have vented they could have vented	I could have been venting you could have been venting he could have been venting we could have been venting you could have been venting they could have been venting

Negation

Simple form	V-ing form
I couldn't vent you couldn't vent he couldn't vent we couldn't vent you couldn't vent they couldn't vent	I couldn't be venting you couldn't be venting he couldn't be venting we couldn't be venting you couldn't be venting they couldn't be venting
Perfect	V-ing perfect
I couldn't have vented you couldn't have vented he couldn't have vented we couldn't have vented you couldn't have vented they couldn't have vented	I couldn't have been venting you couldn't have been venting he couldn't have been venting we couldn't have been venting you couldn't have been venting they couldn't have been venting

Interrogative form

Simple form	V-ing form
could I vent? could you vent? could he vent? could we vent? could you vent? could they vent?	could I be venting? could you be venting? could he be venting? could we be venting? could you be venting? could they be venting?
Perfect	V-ing perfect
could I have vented? could you have vented? could he have vented? could we have vented? could you have vented? could they have vented?	could I have been venting? could you have been venting? could he have been venting? could we have been venting? could you have been venting? could they have been venting?

Interro-negative form

Simple form	V-ing form
couldn't I vent? couldn't you vent? couldn't he vent? couldn't we vent? couldn't you vent? couldn't they vent?	couldn't I be venting? couldn't you be venting? couldn't he be venting? couldn't we be venting? couldn't you be venting? couldn't they be venting?
Perfect	V-ing perfect
couldn't I have vented? couldn't you have vented? couldn't he have vented? couldn't we have vented? couldn't you have vented? couldn't they have vented?	couldn't I have been venting? couldn't you have been venting? couldn't he have been venting? couldn't we have been venting? couldn't you have been venting? couldn't they have been venting?