English verb conjugation
MAY CAUSE

Regular verb: cause - caused - caused

Affirmation

Simple form	V-ing form
I may cause you may cause he may cause we may cause you may cause they may cause	I may be causing you may be causing he may be causing we may be causing you may be causing they may be causing
Perfect	V-ing perfect
I may have caused you may have caused he may have caused we may have caused you may have caused they may have caused	I may have been causing you may have been causing he may have been causing we may have been causing you may have been causing they may have been causing

Negation

Simple form	V-ing form
I mayn't cause you mayn't cause he mayn't cause we mayn't cause you mayn't cause they mayn't cause	I mayn't be causing you mayn't be causing he mayn't be causing we mayn't be causing you mayn't be causing they mayn't be causing
Perfect	V-ing perfect
I mayn't have caused you mayn't have caused he mayn't have caused we mayn't have caused you mayn't have caused they mayn't have caused	I mayn't have been causing you mayn't have been causing he 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	V-ing form
may I cause? may you cause? may he cause? may we cause? may you cause? may they cause?	may I be causing? may you be causing? may he be causing? may we be causing? may you be causing? may they be causing?
Perfect	V-ing perfect
may I have caused? may you have caused? may he have caused? may we have caused? may you have caused? may they have caused?	may I have been causing? may you have been causing? may he have been causing? may we have been causing? may you have been causing? may they have been causing?

Interro-negative form

Simple form	V-ing form
mayn't I cause? mayn't you cause? mayn't he cause? mayn't we cause? mayn't you cause? mayn't they cause?	mayn't I be causing? mayn't you be causing? mayn't he be causing? mayn't we be causing? mayn't you be causing? mayn't they be causing?
Perfect	V-ing perfect
mayn't I have caused? mayn't you have caused? mayn't he have caused? mayn't we have caused? mayn't you have caused? mayn't they have caused?	mayn't I have been causing? mayn't you have been causing? mayn't he have been causing? mayn't we have been causing? mayn't you have been causing? mayn't they have been causing?