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 mayn't founder you mayn't founder she mayn't founder we mayn't founder you mayn't founder they mayn't founder
V-ing form
I mayn't be foundering you mayn't be foundering she mayn't be foundering we mayn't be foundering you mayn't be foundering they mayn't be foundering
Perfect
I mayn't have foundered you mayn't have foundered she mayn't have foundered we mayn't have foundered you mayn't have foundered they mayn't have foundered
V-ing perfect
I mayn't have been foundering you mayn't have been foundering she mayn't have been foundering we mayn't have been foundering you mayn't have been foundering they mayn't 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
mayn't I founder? mayn't you founder? mayn't she founder? mayn't we founder? mayn't you founder? mayn't they founder?
V-ing form
mayn't I be foundering? mayn't you be foundering? mayn't she be foundering? mayn't we be foundering? mayn't you be foundering? mayn't they be foundering?
Perfect
mayn't I have foundered? mayn't you have foundered? mayn't she have foundered? mayn't we have foundered? mayn't you have foundered? mayn't they have foundered?
V-ing perfect
mayn't I have been foundering? mayn't you have been foundering? mayn't she have been foundering? mayn't we have been foundering? mayn't you have been foundering? mayn't they have been foundering?