I can revise you can revise he can revise we can revise you can revise they can revise
V-ing form
I can be revising you can be revising he can be revising we can be revising you can be revising they can be revising
Perfect
I can have revised you can have revised he can have revised we can have revised you can have revised they can have revised
V-ing perfect
I can have been revising you can have been revising he can have been revising we can have been revising you can have been revising they can have been revising
Negation
Simple form
I can't revise you can't revise he can't revise we can't revise you can't revise they can't revise
V-ing form
I can't be revising you can't be revising he can't be revising we can't be revising you can't be revising they can't be revising
Perfect
I can't have revised you can't have revised he can't have revised we can't have revised you can't have revised they can't have revised
V-ing perfect
I can't have been revising you can't have been revising he can't have been revising we can't have been revising you can't have been revising they can't have been revising
Interrogative form
Simple form
can I revise? can you revise? can he revise? can we revise? can you revise? can they revise?
V-ing form
can I be revising? can you be revising? can he be revising? can we be revising? can you be revising? can they be revising?
Perfect
can I have revised? can you have revised? can he have revised? can we have revised? can you have revised? can they have revised?
V-ing perfect
can I have been revising? can you have been revising? can he have been revising? can we have been revising? can you have been revising? can they have been revising?
Interro-negative form
Simple form
can't I revise? can't you revise? can't he revise? can't we revise? can't you revise? can't they revise?
V-ing form
can't I be revising? can't you be revising? can't he be revising? can't we be revising? can't you be revising? can't they be revising?
Perfect
can't I have revised? can't you have revised? can't he have revised? can't we have revised? can't you have revised? can't they have revised?
V-ing perfect
can't I have been revising? can't you have been revising? can't he have been revising? can't we have been revising? can't you have been revising? can't they have been revising?