I can prevail you can prevail she can prevail we can prevail you can prevail they can prevail
V-ing form
I can be prevailing you can be prevailing she can be prevailing we can be prevailing you can be prevailing they can be prevailing
Perfect
I can have prevailed you can have prevailed she 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 she can have been prevailing we can have been prevailing you can have been prevailing they can have been prevailing
Negation
Simple form
I cannot prevail you cannot prevail she cannot prevail we cannot prevail you cannot prevail they cannot prevail
V-ing form
I cannot be prevailing you cannot be prevailing she cannot be prevailing we cannot be prevailing you cannot be prevailing they cannot be prevailing
Perfect
I cannot have prevailed you cannot have prevailed she cannot have prevailed we cannot have prevailed you cannot have prevailed they cannot have prevailed
V-ing perfect
I cannot have been prevailing you cannot have been prevailing she cannot have been prevailing we cannot have been prevailing you cannot have been prevailing they cannot have been prevailing
Interrogative form
Simple form
can I prevail? can you prevail? can she prevail? can we prevail? can you prevail? can they prevail?
V-ing form
can I be prevailing? can you be prevailing? can she be prevailing? can we be prevailing? can you be prevailing? can they be prevailing?
Perfect
can I have prevailed? can you have prevailed? can she 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 she have been prevailing? can we have been prevailing? can you have been prevailing? can they have been prevailing?
Interro-negative form
Simple form
can I not prevail? can you not prevail? can she not prevail? can we not prevail? can you not prevail? can they not prevail?
V-ing form
can I not be prevailing? can you not be prevailing? can she not be prevailing? can we not be prevailing? can you not be prevailing? can they not be prevailing?
Perfect
can I not have prevailed? can you not have prevailed? can she not have prevailed? can we not have prevailed? can you not have prevailed? can they not have prevailed?
V-ing perfect
can I not have been prevailing? can you not have been prevailing? can she not have been prevailing? can we not have been prevailing? can you not have been prevailing? can they not have been prevailing?