English verb conjugation
COULD VEX

Regular verb: vex - vexed - vexed

Affirmation

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