must upshift
Regular verb: upshift - upshifted- upshifted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must upshift
you must upshift
he must upshift
we must upshift
you must upshift
they must upshift 	I must be upshifting
you must be upshifting
he must be upshifting
we must be upshifting
you must be upshifting
they must be upshifting	I must have upshifted
you must have upshifted
he 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
he must have been upshifting
we must have been upshifting
you must have been upshifting
they must have been upshifting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not upshift
you must not upshift
he 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
he 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
he 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
he must not have been upshifting
we must not have been upshifting
you must not have been upshifting
they must not have been upshifting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I upshift?
must you upshift?
must he upshift?
must we upshift?
must you upshift?
must they upshift? 	must I be upshifting?
must you be upshifting?
must he be upshifting?
must we be upshifting?
must you be upshifting?
must they be upshifting? 	must I have upshifted?
must you have upshifted?
must he 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 he have been upshifting?
must we have been upshifting?
must you have been upshifting?
must they have been upshifting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not upshift?
must you not upshift?
must he 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 he 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 he 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 he not have been upshifting?
must we not have been upshifting?
must you not have been upshifting?
must they not have been upshifting?