must surname
Verbo regular: surname - surnamed- surnamed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must surname
you must surname
he must surname
we must surname
you must surname
they must surname 	I must be surnaming
you must be surnaming
he must be surnaming
we must be surnaming
you must be surnaming
they must be surnaming	I must have surnamed
you must have surnamed
he must have surnamed
we must have surnamed
you must have surnamed
they must have surnamed	I must have been surnaming
you must have been surnaming
he must have been surnaming
we must have been surnaming
you must have been surnaming
they must have been surnaming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not surname
you must not surname
he must not surname
we must not surname
you must not surname
they must not surname 	I must not be surnaming
you must not be surnaming
he must not be surnaming
we must not be surnaming
you must not be surnaming
they must not be surnaming	I must not have surnamed
you must not have surnamed
he must not have surnamed
we must not have surnamed
you must not have surnamed
they must not have surnamed	I must not have been surnaming
you must not have been surnaming
he must not have been surnaming
we must not have been surnaming
you must not have been surnaming
they must not have been surnaming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I surname?
must you surname?
must he surname?
must we surname?
must you surname?
must they surname? 	must I be surnaming?
must you be surnaming?
must he be surnaming?
must we be surnaming?
must you be surnaming?
must they be surnaming? 	must I have surnamed?
must you have surnamed?
must he have surnamed?
must we have surnamed?
must you have surnamed?
must they have surnamed? 	must I have been surnaming?
must you have been surnaming?
must he have been surnaming?
must we have been surnaming?
must you have been surnaming?
must they have been surnaming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not surname?
must you not surname?
must he not surname?
must we not surname?
must you not surname?
must they not surname? 	must I not be surnaming?
must you not be surnaming?
must he not be surnaming?
must we not be surnaming?
must you not be surnaming?
must they not be surnaming? 	must I not have surnamed?
must you not have surnamed?
must he not have surnamed?
must we not have surnamed?
must you not have surnamed?
must they not have surnamed? 	must I not have been surnaming?
must you not have been surnaming?
must he not have been surnaming?
must we not have been surnaming?
must you not have been surnaming?
must they not have been surnaming?