I may double you may double she may double we may double you may double they may double
V-ing form
I may be doubling you may be doubling she may be doubling we may be doubling you may be doubling they may be doubling
Perfect
I may have doubled you may have doubled she may have doubled we may have doubled you may have doubled they may have doubled
V-ing perfect
I may have been doubling you may have been doubling she may have been doubling we may have been doubling you may have been doubling they may have been doubling
Negation
Simple form
I mayn't double you mayn't double she mayn't double we mayn't double you mayn't double they mayn't double
V-ing form
I mayn't be doubling you mayn't be doubling she mayn't be doubling we mayn't be doubling you mayn't be doubling they mayn't be doubling
Perfect
I mayn't have doubled you mayn't have doubled she mayn't have doubled we mayn't have doubled you mayn't have doubled they mayn't have doubled
V-ing perfect
I mayn't have been doubling you mayn't have been doubling she mayn't have been doubling we mayn't have been doubling you mayn't have been doubling they mayn't have been doubling
Interrogative form
Simple form
may I double? may you double? may she double? may we double? may you double? may they double?
V-ing form
may I be doubling? may you be doubling? may she be doubling? may we be doubling? may you be doubling? may they be doubling?
Perfect
may I have doubled? may you have doubled? may she have doubled? may we have doubled? may you have doubled? may they have doubled?
V-ing perfect
may I have been doubling? may you have been doubling? may she have been doubling? may we have been doubling? may you have been doubling? may they have been doubling?
Interro-negative form
Simple form
mayn't I double? mayn't you double? mayn't she double? mayn't we double? mayn't you double? mayn't they double?
V-ing form
mayn't I be doubling? mayn't you be doubling? mayn't she be doubling? mayn't we be doubling? mayn't you be doubling? mayn't they be doubling?
Perfect
mayn't I have doubled? mayn't you have doubled? mayn't she have doubled? mayn't we have doubled? mayn't you have doubled? mayn't they have doubled?
V-ing perfect
mayn't I have been doubling? mayn't you have been doubling? mayn't she have been doubling? mayn't we have been doubling? mayn't you have been doubling? mayn't they have been doubling?