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
she must decelerate
we must decelerate
you must decelerate
they must decelerate 	I must be decelerating
you must be decelerating
she must be decelerating
we must be decelerating
you must be decelerating
they must be decelerating	I must have decelerated
you must have decelerated
she 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
she 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 must not decelerate
you must not decelerate
she must not decelerate
we must not decelerate
you must not decelerate
they must not decelerate 	I must not be decelerating
you must not be decelerating
she must not be decelerating
we must not be decelerating
you must not be decelerating
they must not be decelerating	I must not have decelerated
you must not have decelerated
she must not have decelerated
we must not have decelerated
you must not have decelerated
they must not have decelerated	I must not have been decelerating
you must not have been decelerating
she must not have been decelerating
we must not have been decelerating
you must not have been decelerating
they must not have been decelerating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I decelerate?
must you decelerate?
must she decelerate?
must we decelerate?
must you decelerate?
must they decelerate? 	must I be decelerating?
must you be decelerating?
must she be decelerating?
must we be decelerating?
must you be decelerating?
must they be decelerating? 	must I have decelerated?
must you have decelerated?
must she 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 she 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 	
must I not decelerate?
must you not decelerate?
must she not decelerate?
must we not decelerate?
must you not decelerate?
must they not decelerate? 	must I not be decelerating?
must you not be decelerating?
must she not be decelerating?
must we not be decelerating?
must you not be decelerating?
must they not be decelerating? 	must I not have decelerated?
must you not have decelerated?
must she not have decelerated?
must we not have decelerated?
must you not have decelerated?
must they not have decelerated? 	must I not have been decelerating?
must you not have been decelerating?
must she not have been decelerating?
must we not have been decelerating?
must you not have been decelerating?
must they not have been decelerating?