must regain
Verbe régulier : regain - regained- regained
Traduction française : reconquérir - regagner 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not regain
you must not regain
he must not regain
we must not regain
you must not regain
they must not regain 	I must not be regaining
you must not be regaining
he must not be regaining
we must not be regaining
you must not be regaining
they must not be regaining	I must not have regained
you must not have regained
he must not have regained
we must not have regained
you must not have regained
they must not have regained	I must not have been regaining
you must not have been regaining
he must not have been regaining
we must not have been regaining
you must not have been regaining
they must not have been regaining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not regain?
must you not regain?
must he not regain?
must we not regain?
must you not regain?
must they not regain? 	must I not be regaining?
must you not be regaining?
must he not be regaining?
must we not be regaining?
must you not be regaining?
must they not be regaining? 	must I not have regained?
must you not have regained?
must he not have regained?
must we not have regained?
must you not have regained?
must they not have regained? 	must I not have been regaining?
must you not have been regaining?
must he not have been regaining?
must we not have been regaining?
must you not have been regaining?
must they not have been regaining?