English verb conjugation
CAN PREVAIL

Regular verb: prevail - prevailed - prevailed

Affirmation

Simple form	V-ing form
I can prevail you can prevail he can prevail we can prevail you can prevail they can prevail	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	V-ing 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	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	V-ing form
I cannot prevail you cannot prevail he cannot prevail we cannot prevail you cannot prevail they cannot prevail	I cannot be prevailing you cannot be prevailing he cannot be prevailing we cannot be prevailing you cannot be prevailing they cannot be prevailing
Perfect	V-ing perfect
I cannot have prevailed you cannot have prevailed he cannot have prevailed we cannot have prevailed you cannot have prevailed they cannot have prevailed	I cannot have been prevailing you cannot have been prevailing he cannot have been prevailing we cannot have been prevailing you cannot have been prevailing they cannot have been prevailing

Interrogative form

Simple form	V-ing form
can I prevail? can you prevail? can he prevail? can we prevail? can you prevail? can they prevail?	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	V-ing 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?	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	V-ing form
can I not prevail? can you not prevail? can he not prevail? can we not prevail? can you not prevail? can they not prevail?	can I not be prevailing? can you not be prevailing? can he not be prevailing? can we not be prevailing? can you not be prevailing? can they not be prevailing?
Perfect	V-ing perfect
can I not have prevailed? can you not have prevailed? can he not have prevailed? can we not have prevailed? can you not have prevailed? can they not have prevailed?	can I not have been prevailing? can you not have been prevailing? can he not have been prevailing? can we not have been prevailing? can you not have been prevailing? can they not have been prevailing?