I can envisage you can envisage he can envisage we can envisage you can envisage they can envisage
V-ing form
I can be envisaging you can be envisaging he can be envisaging we can be envisaging you can be envisaging they can be envisaging
Perfect
I can have envisaged you can have envisaged he can have envisaged we can have envisaged you can have envisaged they can have envisaged
V-ing perfect
I can have been envisaging you can have been envisaging he can have been envisaging we can have been envisaging you can have been envisaging they can have been envisaging
Negation
Simple form
I can't envisage you can't envisage he can't envisage we can't envisage you can't envisage they can't envisage
V-ing form
I can't be envisaging you can't be envisaging he can't be envisaging we can't be envisaging you can't be envisaging they can't be envisaging
Perfect
I can't have envisaged you can't have envisaged he can't have envisaged we can't have envisaged you can't have envisaged they can't have envisaged
V-ing perfect
I can't have been envisaging you can't have been envisaging he can't have been envisaging we can't have been envisaging you can't have been envisaging they can't have been envisaging
Interrogative form
Simple form
can I envisage? can you envisage? can he envisage? can we envisage? can you envisage? can they envisage?
V-ing form
can I be envisaging? can you be envisaging? can he be envisaging? can we be envisaging? can you be envisaging? can they be envisaging?
Perfect
can I have envisaged? can you have envisaged? can he have envisaged? can we have envisaged? can you have envisaged? can they have envisaged?
V-ing perfect
can I have been envisaging? can you have been envisaging? can he have been envisaging? can we have been envisaging? can you have been envisaging? can they have been envisaging?
Interro-negative form
Simple form
can't I envisage? can't you envisage? can't he envisage? can't we envisage? can't you envisage? can't they envisage?
V-ing form
can't I be envisaging? can't you be envisaging? can't he be envisaging? can't we be envisaging? can't you be envisaging? can't they be envisaging?
Perfect
can't I have envisaged? can't you have envisaged? can't he have envisaged? can't we have envisaged? can't you have envisaged? can't they have envisaged?
V-ing perfect
can't I have been envisaging? can't you have been envisaging? can't he have been envisaging? can't we have been envisaging? can't you have been envisaging? can't they have been envisaging?