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 cannot envisage you cannot envisage he cannot envisage we cannot envisage you cannot envisage they cannot envisage
V-ing form
I cannot be envisaging you cannot be envisaging he cannot be envisaging we cannot be envisaging you cannot be envisaging they cannot be envisaging
Perfect
I cannot have envisaged you cannot have envisaged he cannot have envisaged we cannot have envisaged you cannot have envisaged they cannot have envisaged
V-ing perfect
I cannot have been envisaging you cannot have been envisaging he cannot have been envisaging we cannot have been envisaging you cannot have been envisaging they cannot 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 I not envisage? can you not envisage? can he not envisage? can we not envisage? can you not envisage? can they not envisage?
V-ing form
can I not be envisaging? can you not be envisaging? can he not be envisaging? can we not be envisaging? can you not be envisaging? can they not be envisaging?
Perfect
can I not have envisaged? can you not have envisaged? can he not have envisaged? can we not have envisaged? can you not have envisaged? can they not have envisaged?
V-ing perfect
can I not have been envisaging? can you not have been envisaging? can he not have been envisaging? can we not have been envisaging? can you not have been envisaging? can they not have been envisaging?