must calender
Verbo regular: calender - calendered- calendered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must calender
you must calender
he must calender
we must calender
you must calender
they must calender 	I must be calendering
you must be calendering
he must be calendering
we must be calendering
you must be calendering
they must be calendering	I must have calendered
you must have calendered
he must have calendered
we must have calendered
you must have calendered
they must have calendered	I must have been calendering
you must have been calendering
he must have been calendering
we must have been calendering
you must have been calendering
they must have been calendering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not calender
you must not calender
he must not calender
we must not calender
you must not calender
they must not calender 	I must not be calendering
you must not be calendering
he must not be calendering
we must not be calendering
you must not be calendering
they must not be calendering	I must not have calendered
you must not have calendered
he must not have calendered
we must not have calendered
you must not have calendered
they must not have calendered	I must not have been calendering
you must not have been calendering
he must not have been calendering
we must not have been calendering
you must not have been calendering
they must not have been calendering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I calender?
must you calender?
must he calender?
must we calender?
must you calender?
must they calender? 	must I be calendering?
must you be calendering?
must he be calendering?
must we be calendering?
must you be calendering?
must they be calendering? 	must I have calendered?
must you have calendered?
must he have calendered?
must we have calendered?
must you have calendered?
must they have calendered? 	must I have been calendering?
must you have been calendering?
must he have been calendering?
must we have been calendering?
must you have been calendering?
must they have been calendering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not calender?
must you not calender?
must he not calender?
must we not calender?
must you not calender?
must they not calender? 	must I not be calendering?
must you not be calendering?
must he not be calendering?
must we not be calendering?
must you not be calendering?
must they not be calendering? 	must I not have calendered?
must you not have calendered?
must he not have calendered?
must we not have calendered?
must you not have calendered?
must they not have calendered? 	must I not have been calendering?
must you not have been calendering?
must he not have been calendering?
must we not have been calendering?
must you not have been calendering?
must they not have been calendering?