must vapor
Regular verb: vapor - vapored- vapored

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must vapor
you must vapor
he must vapor
we must vapor
you must vapor
they must vapor 	I must be vaporing
you must be vaporing
he must be vaporing
we must be vaporing
you must be vaporing
they must be vaporing	I must have vapored
you must have vapored
he must have vapored
we must have vapored
you must have vapored
they must have vapored	I must have been vaporing
you must have been vaporing
he must have been vaporing
we must have been vaporing
you must have been vaporing
they must have been vaporing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't vapor
you mustn't vapor
he mustn't vapor
we mustn't vapor
you mustn't vapor
they mustn't vapor 	I mustn't be vaporing
you mustn't be vaporing
he mustn't be vaporing
we mustn't be vaporing
you mustn't be vaporing
they mustn't be vaporing	I mustn't have vapored
you mustn't have vapored
he mustn't have vapored
we mustn't have vapored
you mustn't have vapored
they mustn't have vapored	I mustn't have been vaporing
you mustn't have been vaporing
he mustn't have been vaporing
we mustn't have been vaporing
you mustn't have been vaporing
they mustn't have been vaporing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I vapor?
must you vapor?
must he vapor?
must we vapor?
must you vapor?
must they vapor? 	must I be vaporing?
must you be vaporing?
must he be vaporing?
must we be vaporing?
must you be vaporing?
must they be vaporing? 	must I have vapored?
must you have vapored?
must he have vapored?
must we have vapored?
must you have vapored?
must they have vapored? 	must I have been vaporing?
must you have been vaporing?
must he have been vaporing?
must we have been vaporing?
must you have been vaporing?
must they have been vaporing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I vapor?
mustn't you vapor?
mustn't he vapor?
mustn't we vapor?
mustn't you vapor?
mustn't they vapor? 	mustn't I be vaporing?
mustn't you be vaporing?
mustn't he be vaporing?
mustn't we be vaporing?
mustn't you be vaporing?
mustn't they be vaporing? 	mustn't I have vapored?
mustn't you have vapored?
mustn't he have vapored?
mustn't we have vapored?
mustn't you have vapored?
mustn't they have vapored? 	mustn't I have been vaporing?
mustn't you have been vaporing?
mustn't he have been vaporing?
mustn't we have been vaporing?
mustn't you have been vaporing?
mustn't they have been vaporing?