must upshift
Verbe régulier : upshift - upshifted- upshifted

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must upshift
you must upshift
she must upshift
we must upshift
you must upshift
they must upshift 	I must be upshifting
you must be upshifting
she must be upshifting
we must be upshifting
you must be upshifting
they must be upshifting	I must have upshifted
you must have upshifted
she must have upshifted
we must have upshifted
you must have upshifted
they must have upshifted	I must have been upshifting
you must have been upshifting
she must have been upshifting
we must have been upshifting
you must have been upshifting
they must have been upshifting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not upshift
you must not upshift
she must not upshift
we must not upshift
you must not upshift
they must not upshift 	I must not be upshifting
you must not be upshifting
she must not be upshifting
we must not be upshifting
you must not be upshifting
they must not be upshifting	I must not have upshifted
you must not have upshifted
she must not have upshifted
we must not have upshifted
you must not have upshifted
they must not have upshifted	I must not have been upshifting
you must not have been upshifting
she must not have been upshifting
we must not have been upshifting
you must not have been upshifting
they must not have been upshifting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I upshift?
must you upshift?
must she upshift?
must we upshift?
must you upshift?
must they upshift? 	must I be upshifting?
must you be upshifting?
must she be upshifting?
must we be upshifting?
must you be upshifting?
must they be upshifting? 	must I have upshifted?
must you have upshifted?
must she have upshifted?
must we have upshifted?
must you have upshifted?
must they have upshifted? 	must I have been upshifting?
must you have been upshifting?
must she have been upshifting?
must we have been upshifting?
must you have been upshifting?
must they have been upshifting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not upshift?
must you not upshift?
must she not upshift?
must we not upshift?
must you not upshift?
must they not upshift? 	must I not be upshifting?
must you not be upshifting?
must she not be upshifting?
must we not be upshifting?
must you not be upshifting?
must they not be upshifting? 	must I not have upshifted?
must you not have upshifted?
must she not have upshifted?
must we not have upshifted?
must you not have upshifted?
must they not have upshifted? 	must I not have been upshifting?
must you not have been upshifting?
must she not have been upshifting?
must we not have been upshifting?
must you not have been upshifting?
must they not have been upshifting?