must subserve
Verbo regular: subserve - subserved- subserved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must subserve
you must subserve
he must subserve
we must subserve
you must subserve
they must subserve 	I must be subserving
you must be subserving
he must be subserving
we must be subserving
you must be subserving
they must be subserving	I must have subserved
you must have subserved
he must have subserved
we must have subserved
you must have subserved
they must have subserved	I must have been subserving
you must have been subserving
he must have been subserving
we must have been subserving
you must have been subserving
they must have been subserving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't subserve
you mustn't subserve
he mustn't subserve
we mustn't subserve
you mustn't subserve
they mustn't subserve 	I mustn't be subserving
you mustn't be subserving
he mustn't be subserving
we mustn't be subserving
you mustn't be subserving
they mustn't be subserving	I mustn't have subserved
you mustn't have subserved
he mustn't have subserved
we mustn't have subserved
you mustn't have subserved
they mustn't have subserved	I mustn't have been subserving
you mustn't have been subserving
he mustn't have been subserving
we mustn't have been subserving
you mustn't have been subserving
they mustn't have been subserving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I subserve?
must you subserve?
must he subserve?
must we subserve?
must you subserve?
must they subserve? 	must I be subserving?
must you be subserving?
must he be subserving?
must we be subserving?
must you be subserving?
must they be subserving? 	must I have subserved?
must you have subserved?
must he have subserved?
must we have subserved?
must you have subserved?
must they have subserved? 	must I have been subserving?
must you have been subserving?
must he have been subserving?
must we have been subserving?
must you have been subserving?
must they have been subserving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I subserve?
mustn't you subserve?
mustn't he subserve?
mustn't we subserve?
mustn't you subserve?
mustn't they subserve? 	mustn't I be subserving?
mustn't you be subserving?
mustn't he be subserving?
mustn't we be subserving?
mustn't you be subserving?
mustn't they be subserving? 	mustn't I have subserved?
mustn't you have subserved?
mustn't he have subserved?
mustn't we have subserved?
mustn't you have subserved?
mustn't they have subserved? 	mustn't I have been subserving?
mustn't you have been subserving?
mustn't he have been subserving?
mustn't we have been subserving?
mustn't you have been subserving?
mustn't they have been subserving?