English verb conjugation
MUST VEX

Regular verb: vex - vexed - vexed

Affirmation

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

Negation

Simple form	V-ing form
I mustn't vex you mustn't vex she mustn't vex we mustn't vex you mustn't vex they mustn't vex	I mustn't be vexing you mustn't be vexing she mustn't be vexing we mustn't be vexing you mustn't be vexing they mustn't be vexing
Perfect	V-ing perfect
I mustn't have vexed you mustn't have vexed she mustn't have vexed we mustn't have vexed you mustn't have vexed they mustn't have vexed	I mustn't have been vexing you mustn't have been vexing she mustn't have been vexing we mustn't have been vexing you mustn't have been vexing they mustn't have been vexing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mustn't I vex? mustn't you vex? mustn't she vex? mustn't we vex? mustn't you vex? mustn't they vex?	mustn't I be vexing? mustn't you be vexing? mustn't she be vexing? mustn't we be vexing? mustn't you be vexing? mustn't they be vexing?
Perfect	V-ing perfect
mustn't I have vexed? mustn't you have vexed? mustn't she have vexed? mustn't we have vexed? mustn't you have vexed? mustn't they have vexed?	mustn't I have been vexing? mustn't you have been vexing? mustn't she have been vexing? mustn't we have been vexing? mustn't you have been vexing? mustn't they have been vexing?