may calender
Regular verb: calender - calendered- calendered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may calender
you may calender
she may calender
we may calender
you may calender
they may calender 	I may be calendering
you may be calendering
she may be calendering
we may be calendering
you may be calendering
they may be calendering	I may have calendered
you may have calendered
she may have calendered
we may have calendered
you may have calendered
they may have calendered	I may have been calendering
you may have been calendering
she may have been calendering
we may have been calendering
you may have been calendering
they may have been calendering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't calender
you mayn't calender
she mayn't calender
we mayn't calender
you mayn't calender
they mayn't calender 	I mayn't be calendering
you mayn't be calendering
she mayn't be calendering
we mayn't be calendering
you mayn't be calendering
they mayn't be calendering	I mayn't have calendered
you mayn't have calendered
she mayn't have calendered
we mayn't have calendered
you mayn't have calendered
they mayn't have calendered	I mayn't have been calendering
you mayn't have been calendering
she mayn't have been calendering
we mayn't have been calendering
you mayn't have been calendering
they mayn't have been calendering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I calender?
may you calender?
may she calender?
may we calender?
may you calender?
may they calender? 	may I be calendering?
may you be calendering?
may she be calendering?
may we be calendering?
may you be calendering?
may they be calendering? 	may I have calendered?
may you have calendered?
may she have calendered?
may we have calendered?
may you have calendered?
may they have calendered? 	may I have been calendering?
may you have been calendering?
may she have been calendering?
may we have been calendering?
may you have been calendering?
may they have been calendering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I calender?
mayn't you calender?
mayn't she calender?
mayn't we calender?
mayn't you calender?
mayn't they calender? 	mayn't I be calendering?
mayn't you be calendering?
mayn't she be calendering?
mayn't we be calendering?
mayn't you be calendering?
mayn't they be calendering? 	mayn't I have calendered?
mayn't you have calendered?
mayn't she have calendered?
mayn't we have calendered?
mayn't you have calendered?
mayn't they have calendered? 	mayn't I have been calendering?
mayn't you have been calendering?
mayn't she have been calendering?
mayn't we have been calendering?
mayn't you have been calendering?
mayn't they have been calendering?