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