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