should flash
Regular verb: flash - flashed- flashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd flash
you'd flash
he'd flash
we'd flash
you'd flash
they'd flash 	I'd be flashing
you'd be flashing
he'd be flashing
we'd be flashing
you'd be flashing
they'd be flashing	I should've flashed
you should've flashed
he should've flashed
we should've flashed
you should've flashed
they should've flashed	I should've been flashing
you should've been flashing
he should've been flashing
we should've been flashing
you should've been flashing
they should've been flashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't flash
you shouldn't flash
he shouldn't flash
we shouldn't flash
you shouldn't flash
they shouldn't flash 	I shouldn't be flashing
you shouldn't be flashing
he shouldn't be flashing
we shouldn't be flashing
you shouldn't be flashing
they shouldn't be flashing	I shouldn't have flashed
you shouldn't have flashed
he shouldn't have flashed
we shouldn't have flashed
you shouldn't have flashed
they shouldn't have flashed	I shouldn't have been flashing
you shouldn't have been flashing
he shouldn't have been flashing
we shouldn't have been flashing
you shouldn't have been flashing
they shouldn't have been flashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I flash?
should you flash?
should he flash?
should we flash?
should you flash?
should they flash? 	should I be flashing?
should you be flashing?
should he be flashing?
should we be flashing?
should you be flashing?
should they be flashing? 	should I have flashed?
should you have flashed?
should he have flashed?
should we have flashed?
should you have flashed?
should they have flashed? 	should I have been flashing?
should you have been flashing?
should he have been flashing?
should we have been flashing?
should you have been flashing?
should they have been flashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I flash?
shouldn't you flash?
shouldn't he flash?
shouldn't we flash?
shouldn't you flash?
shouldn't they flash? 	shouldn't I be flashing?
shouldn't you be flashing?
shouldn't he be flashing?
shouldn't we be flashing?
shouldn't you be flashing?
shouldn't they be flashing? 	shouldn't I have flashed?
shouldn't you have flashed?
shouldn't he have flashed?
shouldn't we have flashed?
shouldn't you have flashed?
shouldn't they have flashed? 	shouldn't I have been flashing?
shouldn't you have been flashing?
shouldn't he have been flashing?
shouldn't we have been flashing?
shouldn't you have been flashing?
shouldn't they have been flashing?