must whistle-stop
Regular verb: whistle-stop - whistle-stoped- whistle-stoped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must whistle-stop
you must whistle-stop
he must whistle-stop
we must whistle-stop
you must whistle-stop
they must whistle-stop 	I must be whistle-stoping
you must be whistle-stoping
he must be whistle-stoping
we must be whistle-stoping
you must be whistle-stoping
they must be whistle-stoping	I must have whistle-stoped
you must have whistle-stoped
he must have whistle-stoped
we must have whistle-stoped
you must have whistle-stoped
they must have whistle-stoped	I must have been whistle-stoping
you must have been whistle-stoping
he must have been whistle-stoping
we must have been whistle-stoping
you must have been whistle-stoping
they must have been whistle-stoping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't whistle-stop
you mustn't whistle-stop
he mustn't whistle-stop
we mustn't whistle-stop
you mustn't whistle-stop
they mustn't whistle-stop 	I mustn't be whistle-stoping
you mustn't be whistle-stoping
he mustn't be whistle-stoping
we mustn't be whistle-stoping
you mustn't be whistle-stoping
they mustn't be whistle-stoping	I mustn't have whistle-stoped
you mustn't have whistle-stoped
he mustn't have whistle-stoped
we mustn't have whistle-stoped
you mustn't have whistle-stoped
they mustn't have whistle-stoped	I mustn't have been whistle-stoping
you mustn't have been whistle-stoping
he mustn't have been whistle-stoping
we mustn't have been whistle-stoping
you mustn't have been whistle-stoping
they mustn't have been whistle-stoping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I whistle-stop?
must you whistle-stop?
must he whistle-stop?
must we whistle-stop?
must you whistle-stop?
must they whistle-stop? 	must I be whistle-stoping?
must you be whistle-stoping?
must he be whistle-stoping?
must we be whistle-stoping?
must you be whistle-stoping?
must they be whistle-stoping? 	must I have whistle-stoped?
must you have whistle-stoped?
must he have whistle-stoped?
must we have whistle-stoped?
must you have whistle-stoped?
must they have whistle-stoped? 	must I have been whistle-stoping?
must you have been whistle-stoping?
must he have been whistle-stoping?
must we have been whistle-stoping?
must you have been whistle-stoping?
must they have been whistle-stoping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I whistle-stop?
mustn't you whistle-stop?
mustn't he whistle-stop?
mustn't we whistle-stop?
mustn't you whistle-stop?
mustn't they whistle-stop? 	mustn't I be whistle-stoping?
mustn't you be whistle-stoping?
mustn't he be whistle-stoping?
mustn't we be whistle-stoping?
mustn't you be whistle-stoping?
mustn't they be whistle-stoping? 	mustn't I have whistle-stoped?
mustn't you have whistle-stoped?
mustn't he have whistle-stoped?
mustn't we have whistle-stoped?
mustn't you have whistle-stoped?
mustn't they have whistle-stoped? 	mustn't I have been whistle-stoping?
mustn't you have been whistle-stoping?
mustn't he have been whistle-stoping?
mustn't we have been whistle-stoping?
mustn't you have been whistle-stoping?
mustn't they have been whistle-stoping?