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
she must downshift
we must downshift
you must downshift
they must downshift 	I must be downshifting
you must be downshifting
she must be downshifting
we must be downshifting
you must be downshifting
they must be downshifting	I must have downshifted
you must have downshifted
she 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
she 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 mustn't downshift
you mustn't downshift
she mustn't downshift
we mustn't downshift
you mustn't downshift
they mustn't downshift 	I mustn't be downshifting
you mustn't be downshifting
she mustn't be downshifting
we mustn't be downshifting
you mustn't be downshifting
they mustn't be downshifting	I mustn't have downshifted
you mustn't have downshifted
she mustn't have downshifted
we mustn't have downshifted
you mustn't have downshifted
they mustn't have downshifted	I mustn't have been downshifting
you mustn't have been downshifting
she mustn't have been downshifting
we mustn't have been downshifting
you mustn't have been downshifting
they mustn't have been downshifting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I downshift?
must you downshift?
must she downshift?
must we downshift?
must you downshift?
must they downshift? 	must I be downshifting?
must you be downshifting?
must she be downshifting?
must we be downshifting?
must you be downshifting?
must they be downshifting? 	must I have downshifted?
must you have downshifted?
must she 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 she 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 	
mustn't I downshift?
mustn't you downshift?
mustn't she downshift?
mustn't we downshift?
mustn't you downshift?
mustn't they downshift? 	mustn't I be downshifting?
mustn't you be downshifting?
mustn't she be downshifting?
mustn't we be downshifting?
mustn't you be downshifting?
mustn't they be downshifting? 	mustn't I have downshifted?
mustn't you have downshifted?
mustn't she have downshifted?
mustn't we have downshifted?
mustn't you have downshifted?
mustn't they have downshifted? 	mustn't I have been downshifting?
mustn't you have been downshifting?
mustn't she have been downshifting?
mustn't we have been downshifting?
mustn't you have been downshifting?
mustn't they have been downshifting?