could vex
Regular verb: vex - vexed- vexed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could vex
you could vex
she could vex
we could vex
you could vex
they could vex 	I could be vexing
you could be vexing
she could be vexing
we could be vexing
you could be vexing
they could be vexing	I could have vexed
you could have vexed
she could have vexed
we could have vexed
you could have vexed
they could have vexed	I could have been vexing
you could have been vexing
she could have been vexing
we could have been vexing
you could have been vexing
they could have been vexing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not vex
you could not vex
she could not vex
we could not vex
you could not vex
they could not vex 	I could not be vexing
you could not be vexing
she could not be vexing
we could not be vexing
you could not be vexing
they could not be vexing	I could not have vexed
you could not have vexed
she could not have vexed
we could not have vexed
you could not have vexed
they could not have vexed	I could not have been vexing
you could not have been vexing
she could not have been vexing
we could not have been vexing
you could not have been vexing
they could not have been vexing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I vex?
could you vex?
could she vex?
could we vex?
could you vex?
could they vex? 	could I be vexing?
could you be vexing?
could she be vexing?
could we be vexing?
could you be vexing?
could they be vexing? 	could I have vexed?
could you have vexed?
could she have vexed?
could we have vexed?
could you have vexed?
could they have vexed? 	could I have been vexing?
could you have been vexing?
could she have been vexing?
could we have been vexing?
could you have been vexing?
could they have been vexing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not vex?
could you not vex?
could she not vex?
could we not vex?
could you not vex?
could they not vex? 	could I not be vexing?
could you not be vexing?
could she not be vexing?
could we not be vexing?
could you not be vexing?
could they not be vexing? 	could I not have vexed?
could you not have vexed?
could she not have vexed?
could we not have vexed?
could you not have vexed?
could they not have vexed? 	could I not have been vexing?
could you not have been vexing?
could she not have been vexing?
could we not have been vexing?
could you not have been vexing?
could they not have been vexing?