must subdivide
Regular verb: subdivide - subdivided- subdivided

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must subdivide
you must subdivide
he must subdivide
we must subdivide
you must subdivide
they must subdivide 	I must be subdividing
you must be subdividing
he must be subdividing
we must be subdividing
you must be subdividing
they must be subdividing	I must have subdivided
you must have subdivided
he must have subdivided
we must have subdivided
you must have subdivided
they must have subdivided	I must have been subdividing
you must have been subdividing
he must have been subdividing
we must have been subdividing
you must have been subdividing
they must have been subdividing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't subdivide
you mustn't subdivide
he mustn't subdivide
we mustn't subdivide
you mustn't subdivide
they mustn't subdivide 	I mustn't be subdividing
you mustn't be subdividing
he mustn't be subdividing
we mustn't be subdividing
you mustn't be subdividing
they mustn't be subdividing	I mustn't have subdivided
you mustn't have subdivided
he mustn't have subdivided
we mustn't have subdivided
you mustn't have subdivided
they mustn't have subdivided	I mustn't have been subdividing
you mustn't have been subdividing
he mustn't have been subdividing
we mustn't have been subdividing
you mustn't have been subdividing
they mustn't have been subdividing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I subdivide?
must you subdivide?
must he subdivide?
must we subdivide?
must you subdivide?
must they subdivide? 	must I be subdividing?
must you be subdividing?
must he be subdividing?
must we be subdividing?
must you be subdividing?
must they be subdividing? 	must I have subdivided?
must you have subdivided?
must he have subdivided?
must we have subdivided?
must you have subdivided?
must they have subdivided? 	must I have been subdividing?
must you have been subdividing?
must he have been subdividing?
must we have been subdividing?
must you have been subdividing?
must they have been subdividing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I subdivide?
mustn't you subdivide?
mustn't he subdivide?
mustn't we subdivide?
mustn't you subdivide?
mustn't they subdivide? 	mustn't I be subdividing?
mustn't you be subdividing?
mustn't he be subdividing?
mustn't we be subdividing?
mustn't you be subdividing?
mustn't they be subdividing? 	mustn't I have subdivided?
mustn't you have subdivided?
mustn't he have subdivided?
mustn't we have subdivided?
mustn't you have subdivided?
mustn't they have subdivided? 	mustn't I have been subdividing?
mustn't you have been subdividing?
mustn't he have been subdividing?
mustn't we have been subdividing?
mustn't you have been subdividing?
mustn't they have been subdividing?