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