must decelerate
Verbe régulier : decelerate - decelerated- decelerated
Traduction française : ralentir - ralentir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must decelerate
you must decelerate
he must decelerate
we must decelerate
you must decelerate
they must decelerate 	I must be decelerating
you must be decelerating
he must be decelerating
we must be decelerating
you must be decelerating
they must be decelerating	I must have decelerated
you must have decelerated
he must have decelerated
we must have decelerated
you must have decelerated
they must have decelerated	I must have been decelerating
you must have been decelerating
he must have been decelerating
we must have been decelerating
you must have been decelerating
they must have been decelerating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't decelerate
you mustn't decelerate
he mustn't decelerate
we mustn't decelerate
you mustn't decelerate
they mustn't decelerate 	I mustn't be decelerating
you mustn't be decelerating
he mustn't be decelerating
we mustn't be decelerating
you mustn't be decelerating
they mustn't be decelerating	I mustn't have decelerated
you mustn't have decelerated
he mustn't have decelerated
we mustn't have decelerated
you mustn't have decelerated
they mustn't have decelerated	I mustn't have been decelerating
you mustn't have been decelerating
he mustn't have been decelerating
we mustn't have been decelerating
you mustn't have been decelerating
they mustn't have been decelerating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I decelerate?
must you decelerate?
must he decelerate?
must we decelerate?
must you decelerate?
must they decelerate? 	must I be decelerating?
must you be decelerating?
must he be decelerating?
must we be decelerating?
must you be decelerating?
must they be decelerating? 	must I have decelerated?
must you have decelerated?
must he have decelerated?
must we have decelerated?
must you have decelerated?
must they have decelerated? 	must I have been decelerating?
must you have been decelerating?
must he have been decelerating?
must we have been decelerating?
must you have been decelerating?
must they have been decelerating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I decelerate?
mustn't you decelerate?
mustn't he decelerate?
mustn't we decelerate?
mustn't you decelerate?
mustn't they decelerate? 	mustn't I be decelerating?
mustn't you be decelerating?
mustn't he be decelerating?
mustn't we be decelerating?
mustn't you be decelerating?
mustn't they be decelerating? 	mustn't I have decelerated?
mustn't you have decelerated?
mustn't he have decelerated?
mustn't we have decelerated?
mustn't you have decelerated?
mustn't they have decelerated? 	mustn't I have been decelerating?
mustn't you have been decelerating?
mustn't he have been decelerating?
mustn't we have been decelerating?
mustn't you have been decelerating?
mustn't they have been decelerating?