should downshift
Regular verb: downshift - downshifted- downshifted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd downshift
you'd downshift
he'd downshift
we'd downshift
you'd downshift
they'd downshift 	I'd be downshifting
you'd be downshifting
he'd be downshifting
we'd be downshifting
you'd be downshifting
they'd be downshifting	I should've downshifted
you should've downshifted
he should've downshifted
we should've downshifted
you should've downshifted
they should've downshifted	I should've been downshifting
you should've been downshifting
he should've been downshifting
we should've been downshifting
you should've been downshifting
they should've been downshifting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't downshift
you shouldn't downshift
he shouldn't downshift
we shouldn't downshift
you shouldn't downshift
they shouldn't downshift 	I shouldn't be downshifting
you shouldn't be downshifting
he shouldn't be downshifting
we shouldn't be downshifting
you shouldn't be downshifting
they shouldn't be downshifting	I shouldn't have downshifted
you shouldn't have downshifted
he shouldn't have downshifted
we shouldn't have downshifted
you shouldn't have downshifted
they shouldn't have downshifted	I shouldn't have been downshifting
you shouldn't have been downshifting
he shouldn't have been downshifting
we shouldn't have been downshifting
you shouldn't have been downshifting
they shouldn't have been downshifting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I downshift?
should you downshift?
should he downshift?
should we downshift?
should you downshift?
should they downshift? 	should I be downshifting?
should you be downshifting?
should he be downshifting?
should we be downshifting?
should you be downshifting?
should they be downshifting? 	should I have downshifted?
should you have downshifted?
should he have downshifted?
should we have downshifted?
should you have downshifted?
should they have downshifted? 	should I have been downshifting?
should you have been downshifting?
should he have been downshifting?
should we have been downshifting?
should you have been downshifting?
should they have been downshifting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I downshift?
shouldn't you downshift?
shouldn't he downshift?
shouldn't we downshift?
shouldn't you downshift?
shouldn't they downshift? 	shouldn't I be downshifting?
shouldn't you be downshifting?
shouldn't he be downshifting?
shouldn't we be downshifting?
shouldn't you be downshifting?
shouldn't they be downshifting? 	shouldn't I have downshifted?
shouldn't you have downshifted?
shouldn't he have downshifted?
shouldn't we have downshifted?
shouldn't you have downshifted?
shouldn't they have downshifted? 	shouldn't I have been downshifting?
shouldn't you have been downshifting?
shouldn't he have been downshifting?
shouldn't we have been downshifting?
shouldn't you have been downshifting?
shouldn't they have been downshifting?