may cause
Regular verb: cause - caused- caused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?