could envision
Regular verb: envision - envisioned- envisioned

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

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

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

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