may calender
Regular verb: calender - calendered- calendered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may calender
you may calender
he may calender
we may calender
you may calender
they may calender 	I may be calendering
you may be calendering
he may be calendering
we may be calendering
you may be calendering
they may be calendering	I may have calendered
you may have calendered
he 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
he 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 may not calender
you may not calender
he may not calender
we may not calender
you may not calender
they may not calender 	I may not be calendering
you may not be calendering
he may not be calendering
we may not be calendering
you may not be calendering
they may not be calendering	I may not have calendered
you may not have calendered
he may not have calendered
we may not have calendered
you may not have calendered
they may not have calendered	I may not have been calendering
you may not have been calendering
he may not have been calendering
we may not have been calendering
you may not have been calendering
they may not have been calendering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I calender?
may you calender?
may he calender?
may we calender?
may you calender?
may they calender? 	may I be calendering?
may you be calendering?
may he be calendering?
may we be calendering?
may you be calendering?
may they be calendering? 	may I have calendered?
may you have calendered?
may he 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 he 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 	
may I not calender?
may you not calender?
may he not calender?
may we not calender?
may you not calender?
may they not calender? 	may I not be calendering?
may you not be calendering?
may he not be calendering?
may we not be calendering?
may you not be calendering?
may they not be calendering? 	may I not have calendered?
may you not have calendered?
may he not have calendered?
may we not have calendered?
may you not have calendered?
may they not have calendered? 	may I not have been calendering?
may you not have been calendering?
may he not have been calendering?
may we not have been calendering?
may you not have been calendering?
may they not have been calendering?