I may founder you may founder she may founder we may founder you may founder they may founder
V-ing form
I may be foundering you may be foundering she may be foundering we may be foundering you may be foundering they may be foundering
Perfect
I may have foundered you may have foundered she may have foundered we may have foundered you may have foundered they may have foundered
V-ing perfect
I may have been foundering you may have been foundering she may have been foundering we may have been foundering you may have been foundering they may have been foundering
Negation
Simple form
I may not founder you may not founder she may not founder we may not founder you may not founder they may not founder
V-ing form
I may not be foundering you may not be foundering she may not be foundering we may not be foundering you may not be foundering they may not be foundering
Perfect
I may not have foundered you may not have foundered she may not have foundered we may not have foundered you may not have foundered they may not have foundered
V-ing perfect
I may not have been foundering you may not have been foundering she may not have been foundering we may not have been foundering you may not have been foundering they may not have been foundering
Interrogative form
Simple form
may I founder? may you founder? may she founder? may we founder? may you founder? may they founder?
V-ing form
may I be foundering? may you be foundering? may she be foundering? may we be foundering? may you be foundering? may they be foundering?
Perfect
may I have foundered? may you have foundered? may she have foundered? may we have foundered? may you have foundered? may they have foundered?
V-ing perfect
may I have been foundering? may you have been foundering? may she have been foundering? may we have been foundering? may you have been foundering? may they have been foundering?
Interro-negative form
Simple form
may I not founder? may you not founder? may she not founder? may we not founder? may you not founder? may they not founder?
V-ing form
may I not be foundering? may you not be foundering? may she not be foundering? may we not be foundering? may you not be foundering? may they not be foundering?
Perfect
may I not have foundered? may you not have foundered? may she not have foundered? may we not have foundered? may you not have foundered? may they not have foundered?
V-ing perfect
may I not have been foundering? may you not have been foundering? may she not have been foundering? may we not have been foundering? may you not have been foundering? may they not have been foundering?