must stimulate
Regular verb: stimulate - stimulated- stimulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stimulate
you must stimulate
he must stimulate
we must stimulate
you must stimulate
they must stimulate 	I must be stimulating
you must be stimulating
he must be stimulating
we must be stimulating
you must be stimulating
they must be stimulating	I must have stimulated
you must have stimulated
he must have stimulated
we must have stimulated
you must have stimulated
they must have stimulated	I must have been stimulating
you must have been stimulating
he must have been stimulating
we must have been stimulating
you must have been stimulating
they must have been stimulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't stimulate
you mustn't stimulate
he mustn't stimulate
we mustn't stimulate
you mustn't stimulate
they mustn't stimulate 	I mustn't be stimulating
you mustn't be stimulating
he mustn't be stimulating
we mustn't be stimulating
you mustn't be stimulating
they mustn't be stimulating	I mustn't have stimulated
you mustn't have stimulated
he mustn't have stimulated
we mustn't have stimulated
you mustn't have stimulated
they mustn't have stimulated	I mustn't have been stimulating
you mustn't have been stimulating
he mustn't have been stimulating
we mustn't have been stimulating
you mustn't have been stimulating
they mustn't have been stimulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stimulate?
must you stimulate?
must he stimulate?
must we stimulate?
must you stimulate?
must they stimulate? 	must I be stimulating?
must you be stimulating?
must he be stimulating?
must we be stimulating?
must you be stimulating?
must they be stimulating? 	must I have stimulated?
must you have stimulated?
must he have stimulated?
must we have stimulated?
must you have stimulated?
must they have stimulated? 	must I have been stimulating?
must you have been stimulating?
must he have been stimulating?
must we have been stimulating?
must you have been stimulating?
must they have been stimulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I stimulate?
mustn't you stimulate?
mustn't he stimulate?
mustn't we stimulate?
mustn't you stimulate?
mustn't they stimulate? 	mustn't I be stimulating?
mustn't you be stimulating?
mustn't he be stimulating?
mustn't we be stimulating?
mustn't you be stimulating?
mustn't they be stimulating? 	mustn't I have stimulated?
mustn't you have stimulated?
mustn't he have stimulated?
mustn't we have stimulated?
mustn't you have stimulated?
mustn't they have stimulated? 	mustn't I have been stimulating?
mustn't you have been stimulating?
mustn't he have been stimulating?
mustn't we have been stimulating?
mustn't you have been stimulating?
mustn't they have been stimulating?