I may tough you may tough he may tough we may tough you may tough they may tough
V-ing form
I may be toughing you may be toughing he may be toughing we may be toughing you may be toughing they may be toughing
Perfect
I may have toughed you may have toughed he may have toughed we may have toughed you may have toughed they may have toughed
V-ing perfect
I may have been toughing you may have been toughing he may have been toughing we may have been toughing you may have been toughing they may have been toughing
Negation
Simple form
I mayn't tough you mayn't tough he mayn't tough we mayn't tough you mayn't tough they mayn't tough
V-ing form
I mayn't be toughing you mayn't be toughing he mayn't be toughing we mayn't be toughing you mayn't be toughing they mayn't be toughing
Perfect
I mayn't have toughed you mayn't have toughed he mayn't have toughed we mayn't have toughed you mayn't have toughed they mayn't have toughed
V-ing perfect
I mayn't have been toughing you mayn't have been toughing he mayn't have been toughing we mayn't have been toughing you mayn't have been toughing they mayn't have been toughing
Interrogative form
Simple form
may I tough? may you tough? may he tough? may we tough? may you tough? may they tough?
V-ing form
may I be toughing? may you be toughing? may he be toughing? may we be toughing? may you be toughing? may they be toughing?
Perfect
may I have toughed? may you have toughed? may he have toughed? may we have toughed? may you have toughed? may they have toughed?
V-ing perfect
may I have been toughing? may you have been toughing? may he have been toughing? may we have been toughing? may you have been toughing? may they have been toughing?
Interro-negative form
Simple form
mayn't I tough? mayn't you tough? mayn't he tough? mayn't we tough? mayn't you tough? mayn't they tough?
V-ing form
mayn't I be toughing? mayn't you be toughing? mayn't he be toughing? mayn't we be toughing? mayn't you be toughing? mayn't they be toughing?
Perfect
mayn't I have toughed? mayn't you have toughed? mayn't he have toughed? mayn't we have toughed? mayn't you have toughed? mayn't they have toughed?
V-ing perfect
mayn't I have been toughing? mayn't you have been toughing? mayn't he have been toughing? mayn't we have been toughing? mayn't you have been toughing? mayn't they have been toughing?