must downshift
Verbe régulier : downshift - downshifted- downshifted
Traduction française : (US) rétrograder 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must downshift
you must downshift
he must downshift
we must downshift
you must downshift
they must downshift 	I must be downshifting
you must be downshifting
he must be downshifting
we must be downshifting
you must be downshifting
they must be downshifting	I must have downshifted
you must have downshifted
he must have downshifted
we must have downshifted
you must have downshifted
they must have downshifted	I must have been downshifting
you must have been downshifting
he must have been downshifting
we must have been downshifting
you must have been downshifting
they must have been downshifting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not downshift
you must not downshift
he must not downshift
we must not downshift
you must not downshift
they must not downshift 	I must not be downshifting
you must not be downshifting
he must not be downshifting
we must not be downshifting
you must not be downshifting
they must not be downshifting	I must not have downshifted
you must not have downshifted
he must not have downshifted
we must not have downshifted
you must not have downshifted
they must not have downshifted	I must not have been downshifting
you must not have been downshifting
he must not have been downshifting
we must not have been downshifting
you must not have been downshifting
they must not have been downshifting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I downshift?
must you downshift?
must he downshift?
must we downshift?
must you downshift?
must they downshift? 	must I be downshifting?
must you be downshifting?
must he be downshifting?
must we be downshifting?
must you be downshifting?
must they be downshifting? 	must I have downshifted?
must you have downshifted?
must he have downshifted?
must we have downshifted?
must you have downshifted?
must they have downshifted? 	must I have been downshifting?
must you have been downshifting?
must he have been downshifting?
must we have been downshifting?
must you have been downshifting?
must they have been downshifting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not downshift?
must you not downshift?
must he not downshift?
must we not downshift?
must you not downshift?
must they not downshift? 	must I not be downshifting?
must you not be downshifting?
must he not be downshifting?
must we not be downshifting?
must you not be downshifting?
must they not be downshifting? 	must I not have downshifted?
must you not have downshifted?
must he not have downshifted?
must we not have downshifted?
must you not have downshifted?
must they not have downshifted? 	must I not have been downshifting?
must you not have been downshifting?
must he not have been downshifting?
must we not have been downshifting?
must you not have been downshifting?
must they not have been downshifting?