I may founder you may founder he may founder we may founder you may founder they may founder
V-ing form
I may be foundering you may be foundering he may be foundering we may be foundering you may be foundering they may be foundering
Perfect
I may have foundered you may have foundered he 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 he 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 he 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 he 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 he 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 he 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 he founder? may we founder? may you founder? may they founder?
V-ing form
may I be foundering? may you be foundering? may he be foundering? may we be foundering? may you be foundering? may they be foundering?
Perfect
may I have foundered? may you have foundered? may he 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 he 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 he 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 he 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 he 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 he not have been foundering? may we not have been foundering? may you not have been foundering? may they not have been foundering?