could vent
Regular verb: vent - vented- vented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could vent
you could vent
she could vent
we could vent
you could vent
they could vent 	I could be venting
you could be venting
she could be venting
we could be venting
you could be venting
they could be venting	I could have vented
you could have vented
she 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
she 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 	Perfect 	V-ing perfect 	
I could not vent
you could not vent
she could not vent
we could not vent
you could not vent
they could not vent 	I could not be venting
you could not be venting
she could not be venting
we could not be venting
you could not be venting
they could not be venting	I could not have vented
you could not have vented
she could not have vented
we could not have vented
you could not have vented
they could not have vented	I could not have been venting
you could not have been venting
she could not have been venting
we could not have been venting
you could not have been venting
they could not have been venting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I vent?
could you vent?
could she vent?
could we vent?
could you vent?
could they vent? 	could I be venting?
could you be venting?
could she be venting?
could we be venting?
could you be venting?
could they be venting? 	could I have vented?
could you have vented?
could she 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 she 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 	Perfect 	V-ing perfect 	
could I not vent?
could you not vent?
could she not vent?
could we not vent?
could you not vent?
could they not vent? 	could I not be venting?
could you not be venting?
could she not be venting?
could we not be venting?
could you not be venting?
could they not be venting? 	could I not have vented?
could you not have vented?
could she not have vented?
could we not have vented?
could you not have vented?
could they not have vented? 	could I not have been venting?
could you not have been venting?
could she not have been venting?
could we not have been venting?
could you not have been venting?
could they not have been venting?