must default
Verbo regular: default - defaulted- defaulted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must default
you must default
he must default
we must default
you must default
they must default 	I must be defaulting
you must be defaulting
he must be defaulting
we must be defaulting
you must be defaulting
they must be defaulting	I must have defaulted
you must have defaulted
he must have defaulted
we must have defaulted
you must have defaulted
they must have defaulted	I must have been defaulting
you must have been defaulting
he must have been defaulting
we must have been defaulting
you must have been defaulting
they must have been defaulting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't default
you mustn't default
he mustn't default
we mustn't default
you mustn't default
they mustn't default 	I mustn't be defaulting
you mustn't be defaulting
he mustn't be defaulting
we mustn't be defaulting
you mustn't be defaulting
they mustn't be defaulting	I mustn't have defaulted
you mustn't have defaulted
he mustn't have defaulted
we mustn't have defaulted
you mustn't have defaulted
they mustn't have defaulted	I mustn't have been defaulting
you mustn't have been defaulting
he mustn't have been defaulting
we mustn't have been defaulting
you mustn't have been defaulting
they mustn't have been defaulting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I default?
must you default?
must he default?
must we default?
must you default?
must they default? 	must I be defaulting?
must you be defaulting?
must he be defaulting?
must we be defaulting?
must you be defaulting?
must they be defaulting? 	must I have defaulted?
must you have defaulted?
must he have defaulted?
must we have defaulted?
must you have defaulted?
must they have defaulted? 	must I have been defaulting?
must you have been defaulting?
must he have been defaulting?
must we have been defaulting?
must you have been defaulting?
must they have been defaulting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I default?
mustn't you default?
mustn't he default?
mustn't we default?
mustn't you default?
mustn't they default? 	mustn't I be defaulting?
mustn't you be defaulting?
mustn't he be defaulting?
mustn't we be defaulting?
mustn't you be defaulting?
mustn't they be defaulting? 	mustn't I have defaulted?
mustn't you have defaulted?
mustn't he have defaulted?
mustn't we have defaulted?
mustn't you have defaulted?
mustn't they have defaulted? 	mustn't I have been defaulting?
mustn't you have been defaulting?
mustn't he have been defaulting?
mustn't we have been defaulting?
mustn't you have been defaulting?
mustn't they have been defaulting?