I can prevail you can prevail he can prevail we can prevail you can prevail they can prevail
V-ing form
I can be prevailing you can be prevailing he can be prevailing we can be prevailing you can be prevailing they can be prevailing
Perfect
I can have prevailed you can have prevailed he can have prevailed we can have prevailed you can have prevailed they can have prevailed
V-ing perfect
I can have been prevailing you can have been prevailing he can have been prevailing we can have been prevailing you can have been prevailing they can have been prevailing
Negation
Simple form
I can't prevail you can't prevail he can't prevail we can't prevail you can't prevail they can't prevail
V-ing form
I can't be prevailing you can't be prevailing he can't be prevailing we can't be prevailing you can't be prevailing they can't be prevailing
Perfect
I can't have prevailed you can't have prevailed he can't have prevailed we can't have prevailed you can't have prevailed they can't have prevailed
V-ing perfect
I can't have been prevailing you can't have been prevailing he can't have been prevailing we can't have been prevailing you can't have been prevailing they can't have been prevailing
Interrogative form
Simple form
can I prevail? can you prevail? can he prevail? can we prevail? can you prevail? can they prevail?
V-ing form
can I be prevailing? can you be prevailing? can he be prevailing? can we be prevailing? can you be prevailing? can they be prevailing?
Perfect
can I have prevailed? can you have prevailed? can he have prevailed? can we have prevailed? can you have prevailed? can they have prevailed?
V-ing perfect
can I have been prevailing? can you have been prevailing? can he have been prevailing? can we have been prevailing? can you have been prevailing? can they have been prevailing?
Interro-negative form
Simple form
can't I prevail? can't you prevail? can't he prevail? can't we prevail? can't you prevail? can't they prevail?
V-ing form
can't I be prevailing? can't you be prevailing? can't he be prevailing? can't we be prevailing? can't you be prevailing? can't they be prevailing?
Perfect
can't I have prevailed? can't you have prevailed? can't he have prevailed? can't we have prevailed? can't you have prevailed? can't they have prevailed?
V-ing perfect
can't I have been prevailing? can't you have been prevailing? can't he have been prevailing? can't we have been prevailing? can't you have been prevailing? can't they have been prevailing?