should sin
Regular verb: sin - sinned- sinned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd sin
you'd sin
she'd sin
we'd sin
you'd sin
they'd sin 	I'd be sinning
you'd be sinning
she'd be sinning
we'd be sinning
you'd be sinning
they'd be sinning	I should've sinned
you should've sinned
she should've sinned
we should've sinned
you should've sinned
they should've sinned	I should've been sinning
you should've been sinning
she should've been sinning
we should've been sinning
you should've been sinning
they should've been sinning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't sin
you shouldn't sin
she shouldn't sin
we shouldn't sin
you shouldn't sin
they shouldn't sin 	I shouldn't be sinning
you shouldn't be sinning
she shouldn't be sinning
we shouldn't be sinning
you shouldn't be sinning
they shouldn't be sinning	I shouldn't have sinned
you shouldn't have sinned
she shouldn't have sinned
we shouldn't have sinned
you shouldn't have sinned
they shouldn't have sinned	I shouldn't have been sinning
you shouldn't have been sinning
she shouldn't have been sinning
we shouldn't have been sinning
you shouldn't have been sinning
they shouldn't have been sinning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I sin?
should you sin?
should she sin?
should we sin?
should you sin?
should they sin? 	should I be sinning?
should you be sinning?
should she be sinning?
should we be sinning?
should you be sinning?
should they be sinning? 	should I have sinned?
should you have sinned?
should she have sinned?
should we have sinned?
should you have sinned?
should they have sinned? 	should I have been sinning?
should you have been sinning?
should she have been sinning?
should we have been sinning?
should you have been sinning?
should they have been sinning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I sin?
shouldn't you sin?
shouldn't she sin?
shouldn't we sin?
shouldn't you sin?
shouldn't they sin? 	shouldn't I be sinning?
shouldn't you be sinning?
shouldn't she be sinning?
shouldn't we be sinning?
shouldn't you be sinning?
shouldn't they be sinning? 	shouldn't I have sinned?
shouldn't you have sinned?
shouldn't she have sinned?
shouldn't we have sinned?
shouldn't you have sinned?
shouldn't they have sinned? 	shouldn't I have been sinning?
shouldn't you have been sinning?
shouldn't she have been sinning?
shouldn't we have been sinning?
shouldn't you have been sinning?
shouldn't they have been sinning?