should scratch
Regular verb: scratch - scratched- scratched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd scratch
you'd scratch
she'd scratch
we'd scratch
you'd scratch
they'd scratch 	I'd be scratching
you'd be scratching
she'd be scratching
we'd be scratching
you'd be scratching
they'd be scratching	I should've scratched
you should've scratched
she should've scratched
we should've scratched
you should've scratched
they should've scratched	I should've been scratching
you should've been scratching
she should've been scratching
we should've been scratching
you should've been scratching
they should've been scratching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't scratch
you shouldn't scratch
she shouldn't scratch
we shouldn't scratch
you shouldn't scratch
they shouldn't scratch 	I shouldn't be scratching
you shouldn't be scratching
she shouldn't be scratching
we shouldn't be scratching
you shouldn't be scratching
they shouldn't be scratching	I shouldn't have scratched
you shouldn't have scratched
she shouldn't have scratched
we shouldn't have scratched
you shouldn't have scratched
they shouldn't have scratched	I shouldn't have been scratching
you shouldn't have been scratching
she shouldn't have been scratching
we shouldn't have been scratching
you shouldn't have been scratching
they shouldn't have been scratching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I scratch?
should you scratch?
should she scratch?
should we scratch?
should you scratch?
should they scratch? 	should I be scratching?
should you be scratching?
should she be scratching?
should we be scratching?
should you be scratching?
should they be scratching? 	should I have scratched?
should you have scratched?
should she have scratched?
should we have scratched?
should you have scratched?
should they have scratched? 	should I have been scratching?
should you have been scratching?
should she have been scratching?
should we have been scratching?
should you have been scratching?
should they have been scratching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I scratch?
shouldn't you scratch?
shouldn't she scratch?
shouldn't we scratch?
shouldn't you scratch?
shouldn't they scratch? 	shouldn't I be scratching?
shouldn't you be scratching?
shouldn't she be scratching?
shouldn't we be scratching?
shouldn't you be scratching?
shouldn't they be scratching? 	shouldn't I have scratched?
shouldn't you have scratched?
shouldn't she have scratched?
shouldn't we have scratched?
shouldn't you have scratched?
shouldn't they have scratched? 	shouldn't I have been scratching?
shouldn't you have been scratching?
shouldn't she have been scratching?
shouldn't we have been scratching?
shouldn't you have been scratching?
shouldn't they have been scratching?