must serve
Verbo regular: serve - served- served

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must serve
you must serve
she must serve
we must serve
you must serve
they must serve 	I must be serving
you must be serving
she must be serving
we must be serving
you must be serving
they must be serving	I must have served
you must have served
she must have served
we must have served
you must have served
they must have served	I must have been serving
you must have been serving
she must have been serving
we must have been serving
you must have been serving
they must have been serving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not serve
you must not serve
she must not serve
we must not serve
you must not serve
they must not serve 	I must not be serving
you must not be serving
she must not be serving
we must not be serving
you must not be serving
they must not be serving	I must not have served
you must not have served
she must not have served
we must not have served
you must not have served
they must not have served	I must not have been serving
you must not have been serving
she must not have been serving
we must not have been serving
you must not have been serving
they must not have been serving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I serve?
must you serve?
must she serve?
must we serve?
must you serve?
must they serve? 	must I be serving?
must you be serving?
must she be serving?
must we be serving?
must you be serving?
must they be serving? 	must I have served?
must you have served?
must she have served?
must we have served?
must you have served?
must they have served? 	must I have been serving?
must you have been serving?
must she have been serving?
must we have been serving?
must you have been serving?
must they have been serving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not serve?
must you not serve?
must she not serve?
must we not serve?
must you not serve?
must they not serve? 	must I not be serving?
must you not be serving?
must she not be serving?
must we not be serving?
must you not be serving?
must they not be serving? 	must I not have served?
must you not have served?
must she not have served?
must we not have served?
must you not have served?
must they not have served? 	must I not have been serving?
must you not have been serving?
must she not have been serving?
must we not have been serving?
must you not have been serving?
must they not have been serving?