must survive
Verbo regular: survive - survived- survived

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

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

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

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