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 mayn't founder you mayn't founder he 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 he 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 he 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 he 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 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
mayn't I founder? mayn't you founder? mayn't he 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 he 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 he 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 he have been foundering? mayn't we have been foundering? mayn't you have been foundering? mayn't they have been foundering?