should screw
Regular verb: screw - screwed- screwed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd screw
you'd screw
he'd screw
we'd screw
you'd screw
they'd screw 	I'd be screwing
you'd be screwing
he'd be screwing
we'd be screwing
you'd be screwing
they'd be screwing	I should've screwed
you should've screwed
he should've screwed
we should've screwed
you should've screwed
they should've screwed	I should've been screwing
you should've been screwing
he should've been screwing
we should've been screwing
you should've been screwing
they should've been screwing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't screw
you shouldn't screw
he shouldn't screw
we shouldn't screw
you shouldn't screw
they shouldn't screw 	I shouldn't be screwing
you shouldn't be screwing
he shouldn't be screwing
we shouldn't be screwing
you shouldn't be screwing
they shouldn't be screwing	I shouldn't have screwed
you shouldn't have screwed
he shouldn't have screwed
we shouldn't have screwed
you shouldn't have screwed
they shouldn't have screwed	I shouldn't have been screwing
you shouldn't have been screwing
he shouldn't have been screwing
we shouldn't have been screwing
you shouldn't have been screwing
they shouldn't have been screwing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I screw?
should you screw?
should he screw?
should we screw?
should you screw?
should they screw? 	should I be screwing?
should you be screwing?
should he be screwing?
should we be screwing?
should you be screwing?
should they be screwing? 	should I have screwed?
should you have screwed?
should he have screwed?
should we have screwed?
should you have screwed?
should they have screwed? 	should I have been screwing?
should you have been screwing?
should he have been screwing?
should we have been screwing?
should you have been screwing?
should they have been screwing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I screw?
shouldn't you screw?
shouldn't he screw?
shouldn't we screw?
shouldn't you screw?
shouldn't they screw? 	shouldn't I be screwing?
shouldn't you be screwing?
shouldn't he be screwing?
shouldn't we be screwing?
shouldn't you be screwing?
shouldn't they be screwing? 	shouldn't I have screwed?
shouldn't you have screwed?
shouldn't he have screwed?
shouldn't we have screwed?
shouldn't you have screwed?
shouldn't they have screwed? 	shouldn't I have been screwing?
shouldn't you have been screwing?
shouldn't he have been screwing?
shouldn't we have been screwing?
shouldn't you have been screwing?
shouldn't they have been screwing?