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I may have superseded you may have superseded he may have superseded we may have superseded you may have superseded they may have superseded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I mayn't have superseded you mayn't have superseded he mayn't have superseded we mayn't have superseded you mayn't have superseded they mayn't have superseded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may I have superseded? may you have superseded? may he have superseded? may we have superseded? may you have superseded? may they have superseded?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mayn't I have superseded? mayn't you have superseded? mayn't he have superseded? mayn't we have superseded? mayn't you have superseded? mayn't they have superseded?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