must whipsaw
Regular verb: whipsaw - whipsawed- whipsawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must whipsaw
you must whipsaw
he must whipsaw
we must whipsaw
you must whipsaw
they must whipsaw 	I must be whipsawing
you must be whipsawing
he must be whipsawing
we must be whipsawing
you must be whipsawing
they must be whipsawing	I must have whipsawed
you must have whipsawed
he must have whipsawed
we must have whipsawed
you must have whipsawed
they must have whipsawed	I must have been whipsawing
you must have been whipsawing
he must have been whipsawing
we must have been whipsawing
you must have been whipsawing
they must have been whipsawing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't whipsaw
you mustn't whipsaw
he mustn't whipsaw
we mustn't whipsaw
you mustn't whipsaw
they mustn't whipsaw 	I mustn't be whipsawing
you mustn't be whipsawing
he mustn't be whipsawing
we mustn't be whipsawing
you mustn't be whipsawing
they mustn't be whipsawing	I mustn't have whipsawed
you mustn't have whipsawed
he mustn't have whipsawed
we mustn't have whipsawed
you mustn't have whipsawed
they mustn't have whipsawed	I mustn't have been whipsawing
you mustn't have been whipsawing
he mustn't have been whipsawing
we mustn't have been whipsawing
you mustn't have been whipsawing
they mustn't have been whipsawing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I whipsaw?
must you whipsaw?
must he whipsaw?
must we whipsaw?
must you whipsaw?
must they whipsaw? 	must I be whipsawing?
must you be whipsawing?
must he be whipsawing?
must we be whipsawing?
must you be whipsawing?
must they be whipsawing? 	must I have whipsawed?
must you have whipsawed?
must he have whipsawed?
must we have whipsawed?
must you have whipsawed?
must they have whipsawed? 	must I have been whipsawing?
must you have been whipsawing?
must he have been whipsawing?
must we have been whipsawing?
must you have been whipsawing?
must they have been whipsawing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I whipsaw?
mustn't you whipsaw?
mustn't he whipsaw?
mustn't we whipsaw?
mustn't you whipsaw?
mustn't they whipsaw? 	mustn't I be whipsawing?
mustn't you be whipsawing?
mustn't he be whipsawing?
mustn't we be whipsawing?
mustn't you be whipsawing?
mustn't they be whipsawing? 	mustn't I have whipsawed?
mustn't you have whipsawed?
mustn't he have whipsawed?
mustn't we have whipsawed?
mustn't you have whipsawed?
mustn't they have whipsawed? 	mustn't I have been whipsawing?
mustn't you have been whipsawing?
mustn't he have been whipsawing?
mustn't we have been whipsawing?
mustn't you have been whipsawing?
mustn't they have been whipsawing?