must muster
Verbo regular: muster - mustered- mustered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must muster
you must muster
she must muster
we must muster
you must muster
they must muster 	I must be mustering
you must be mustering
she must be mustering
we must be mustering
you must be mustering
they must be mustering	I must have mustered
you must have mustered
she must have mustered
we must have mustered
you must have mustered
they must have mustered	I must have been mustering
you must have been mustering
she must have been mustering
we must have been mustering
you must have been mustering
they must have been mustering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not muster
you must not muster
she must not muster
we must not muster
you must not muster
they must not muster 	I must not be mustering
you must not be mustering
she must not be mustering
we must not be mustering
you must not be mustering
they must not be mustering	I must not have mustered
you must not have mustered
she must not have mustered
we must not have mustered
you must not have mustered
they must not have mustered	I must not have been mustering
you must not have been mustering
she must not have been mustering
we must not have been mustering
you must not have been mustering
they must not have been mustering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I muster?
must you muster?
must she muster?
must we muster?
must you muster?
must they muster? 	must I be mustering?
must you be mustering?
must she be mustering?
must we be mustering?
must you be mustering?
must they be mustering? 	must I have mustered?
must you have mustered?
must she have mustered?
must we have mustered?
must you have mustered?
must they have mustered? 	must I have been mustering?
must you have been mustering?
must she have been mustering?
must we have been mustering?
must you have been mustering?
must they have been mustering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not muster?
must you not muster?
must she not muster?
must we not muster?
must you not muster?
must they not muster? 	must I not be mustering?
must you not be mustering?
must she not be mustering?
must we not be mustering?
must you not be mustering?
must they not be mustering? 	must I not have mustered?
must you not have mustered?
must she not have mustered?
must we not have mustered?
must you not have mustered?
must they not have mustered? 	must I not have been mustering?
must you not have been mustering?
must she not have been mustering?
must we not have been mustering?
must you not have been mustering?
must they not have been mustering?