I may double you may double he may double we may double you may double they may double
V-ing form
I may be doubling you may be doubling he may be doubling we may be doubling you may be doubling they may be doubling
Perfect
I may have doubled you may have doubled he 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 he 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 he 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 he 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 he 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 he 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 he double? may we double? may you double? may they double?
V-ing form
may I be doubling? may you be doubling? may he be doubling? may we be doubling? may you be doubling? may they be doubling?
Perfect
may I have doubled? may you have doubled? may he 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 he 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 he 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 he 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 he 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 he have been doubling? mayn't we have been doubling? mayn't you have been doubling? mayn't they have been doubling?