must sober
Verbo regular: sober - sobered- sobered

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

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

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

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