must underlay
Verbe irrégulier : underlay - underlaid- underlaid
Traduction française : doubler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must underlay
you must underlay
he must underlay
we must underlay
you must underlay
they must underlay 	I must be underlaying
you must be underlaying
he must be underlaying
we must be underlaying
you must be underlaying
they must be underlaying	I must have underlaid
you must have underlaid
he must have underlaid
we must have underlaid
you must have underlaid
they must have underlaid	I must have been underlaying
you must have been underlaying
he must have been underlaying
we must have been underlaying
you must have been underlaying
they must have been underlaying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't underlay
you mustn't underlay
he mustn't underlay
we mustn't underlay
you mustn't underlay
they mustn't underlay 	I mustn't be underlaying
you mustn't be underlaying
he mustn't be underlaying
we mustn't be underlaying
you mustn't be underlaying
they mustn't be underlaying	I mustn't have underlaid
you mustn't have underlaid
he mustn't have underlaid
we mustn't have underlaid
you mustn't have underlaid
they mustn't have underlaid	I mustn't have been underlaying
you mustn't have been underlaying
he mustn't have been underlaying
we mustn't have been underlaying
you mustn't have been underlaying
they mustn't have been underlaying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I underlay?
must you underlay?
must he underlay?
must we underlay?
must you underlay?
must they underlay? 	must I be underlaying?
must you be underlaying?
must he be underlaying?
must we be underlaying?
must you be underlaying?
must they be underlaying? 	must I have underlaid?
must you have underlaid?
must he have underlaid?
must we have underlaid?
must you have underlaid?
must they have underlaid? 	must I have been underlaying?
must you have been underlaying?
must he have been underlaying?
must we have been underlaying?
must you have been underlaying?
must they have been underlaying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I underlay?
mustn't you underlay?
mustn't he underlay?
mustn't we underlay?
mustn't you underlay?
mustn't they underlay? 	mustn't I be underlaying?
mustn't you be underlaying?
mustn't he be underlaying?
mustn't we be underlaying?
mustn't you be underlaying?
mustn't they be underlaying? 	mustn't I have underlaid?
mustn't you have underlaid?
mustn't he have underlaid?
mustn't we have underlaid?
mustn't you have underlaid?
mustn't they have underlaid? 	mustn't I have been underlaying?
mustn't you have been underlaying?
mustn't he have been underlaying?
mustn't we have been underlaying?
mustn't you have been underlaying?
mustn't they have been underlaying?