must zap
Regular verb: zap - zapped- zapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must zap
you must zap
he must zap
we must zap
you must zap
they must zap 	I must be zapping
you must be zapping
he must be zapping
we must be zapping
you must be zapping
they must be zapping	I must have zapped
you must have zapped
he must have zapped
we must have zapped
you must have zapped
they must have zapped	I must have been zapping
you must have been zapping
he must have been zapping
we must have been zapping
you must have been zapping
they must have been zapping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't zap
you mustn't zap
he mustn't zap
we mustn't zap
you mustn't zap
they mustn't zap 	I mustn't be zapping
you mustn't be zapping
he mustn't be zapping
we mustn't be zapping
you mustn't be zapping
they mustn't be zapping	I mustn't have zapped
you mustn't have zapped
he mustn't have zapped
we mustn't have zapped
you mustn't have zapped
they mustn't have zapped	I mustn't have been zapping
you mustn't have been zapping
he mustn't have been zapping
we mustn't have been zapping
you mustn't have been zapping
they mustn't have been zapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I zap?
must you zap?
must he zap?
must we zap?
must you zap?
must they zap? 	must I be zapping?
must you be zapping?
must he be zapping?
must we be zapping?
must you be zapping?
must they be zapping? 	must I have zapped?
must you have zapped?
must he have zapped?
must we have zapped?
must you have zapped?
must they have zapped? 	must I have been zapping?
must you have been zapping?
must he have been zapping?
must we have been zapping?
must you have been zapping?
must they have been zapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I zap?
mustn't you zap?
mustn't he zap?
mustn't we zap?
mustn't you zap?
mustn't they zap? 	mustn't I be zapping?
mustn't you be zapping?
mustn't he be zapping?
mustn't we be zapping?
mustn't you be zapping?
mustn't they be zapping? 	mustn't I have zapped?
mustn't you have zapped?
mustn't he have zapped?
mustn't we have zapped?
mustn't you have zapped?
mustn't they have zapped? 	mustn't I have been zapping?
mustn't you have been zapping?
mustn't he have been zapping?
mustn't we have been zapping?
mustn't you have been zapping?
mustn't they have been zapping?