could muster
Verbo regular: muster - mustered- mustered

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

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

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

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