English verb conjugation
MAY PREVENT

Regular verb: prevent - prevented - prevented

Affirmation

Simple form	V-ing form
I may prevent you may prevent she may prevent we may prevent you may prevent they may prevent	I may be preventing you may be preventing she may be preventing we may be preventing you may be preventing they may be preventing
Perfect	V-ing perfect
I may have prevented you may have prevented she may have prevented we may have prevented you may have prevented they may have prevented	I may have been preventing you may have been preventing she may have been preventing we may have been preventing you may have been preventing they may have been preventing

Negation

Simple form	V-ing form
I may not prevent you may not prevent she may not prevent we may not prevent you may not prevent they may not prevent	I may not be preventing you may not be preventing she may not be preventing we may not be preventing you may not be preventing they may not be preventing
Perfect	V-ing perfect
I may not have prevented you may not have prevented she may not have prevented we may not have prevented you may not have prevented they may not have prevented	I may not have been preventing you may not have been preventing she may not have been preventing we may not have been preventing you may not have been preventing they may not have been preventing

Interrogative form

Simple form	V-ing form
may I prevent? may you prevent? may she prevent? may we prevent? may you prevent? may they prevent?	may I be preventing? may you be preventing? may she be preventing? may we be preventing? may you be preventing? may they be preventing?
Perfect	V-ing perfect
may I have prevented? may you have prevented? may she have prevented? may we have prevented? may you have prevented? may they have prevented?	may I have been preventing? may you have been preventing? may she have been preventing? may we have been preventing? may you have been preventing? may they have been preventing?

Interro-negative form

Simple form	V-ing form
may I not prevent? may you not prevent? may she not prevent? may we not prevent? may you not prevent? may they not prevent?	may I not be preventing? may you not be preventing? may she not be preventing? may we not be preventing? may you not be preventing? may they not be preventing?
Perfect	V-ing perfect
may I not have prevented? may you not have prevented? may she not have prevented? may we not have prevented? may you not have prevented? may they not have prevented?	may I not have been preventing? may you not have been preventing? may she not have been preventing? may we not have been preventing? may you not have been preventing? may they not have been preventing?