must envision
Regular verb: envision - envisioned- envisioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must envision
you must envision
she must envision
we must envision
you must envision
they must envision 	I must be envisioning
you must be envisioning
she must be envisioning
we must be envisioning
you must be envisioning
they must be envisioning	I must have envisioned
you must have envisioned
she must have envisioned
we must have envisioned
you must have envisioned
they must have envisioned	I must have been envisioning
you must have been envisioning
she must have been envisioning
we must have been envisioning
you must have been envisioning
they must have been envisioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't envision
you mustn't envision
she mustn't envision
we mustn't envision
you mustn't envision
they mustn't envision 	I mustn't be envisioning
you mustn't be envisioning
she mustn't be envisioning
we mustn't be envisioning
you mustn't be envisioning
they mustn't be envisioning	I mustn't have envisioned
you mustn't have envisioned
she mustn't have envisioned
we mustn't have envisioned
you mustn't have envisioned
they mustn't have envisioned	I mustn't have been envisioning
you mustn't have been envisioning
she mustn't have been envisioning
we mustn't have been envisioning
you mustn't have been envisioning
they mustn't have been envisioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I envision?
must you envision?
must she envision?
must we envision?
must you envision?
must they envision? 	must I be envisioning?
must you be envisioning?
must she be envisioning?
must we be envisioning?
must you be envisioning?
must they be envisioning? 	must I have envisioned?
must you have envisioned?
must she have envisioned?
must we have envisioned?
must you have envisioned?
must they have envisioned? 	must I have been envisioning?
must you have been envisioning?
must she have been envisioning?
must we have been envisioning?
must you have been envisioning?
must they have been envisioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I envision?
mustn't you envision?
mustn't she envision?
mustn't we envision?
mustn't you envision?
mustn't they envision? 	mustn't I be envisioning?
mustn't you be envisioning?
mustn't she be envisioning?
mustn't we be envisioning?
mustn't you be envisioning?
mustn't they be envisioning? 	mustn't I have envisioned?
mustn't you have envisioned?
mustn't she have envisioned?
mustn't we have envisioned?
mustn't you have envisioned?
mustn't they have envisioned? 	mustn't I have been envisioning?
mustn't you have been envisioning?
mustn't she have been envisioning?
mustn't we have been envisioning?
mustn't you have been envisioning?
mustn't they have been envisioning?