must regain
Verbo regular: regain - regained- regained

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

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

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

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