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