must be
Verbo irregular: be - was/were- been

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

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

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

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