I should screw you should screw he should screw we should screw you should screw they should screw
V-ing form
I should be screwing you should be screwing he should be screwing we should be screwing you should be screwing they should be screwing
Perfect
I should have screwed you should have screwed he should have screwed we should have screwed you should have screwed they should have screwed
V-ing perfect
I should have been screwing you should have been screwing he should have been screwing we should have been screwing you should have been screwing they should have been screwing
Negation
Simple form
I should not screw you should not screw he should not screw we should not screw you should not screw they should not screw
V-ing form
I should not be screwing you should not be screwing he should not be screwing we should not be screwing you should not be screwing they should not be screwing
Perfect
I should not have screwed you should not have screwed he should not have screwed we should not have screwed you should not have screwed they should not have screwed
V-ing perfect
I should not have been screwing you should not have been screwing he should not have been screwing we should not have been screwing you should not have been screwing they should not have been screwing
Interrogative form
Simple form
should I screw? should you screw? should he screw? should we screw? should you screw? should they screw?
V-ing form
should I be screwing? should you be screwing? should he be screwing? should we be screwing? should you be screwing? should they be screwing?
Perfect
should I have screwed? should you have screwed? should he have screwed? should we have screwed? should you have screwed? should they have screwed?
V-ing perfect
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
should I not screw? should you not screw? should he not screw? should we not screw? should you not screw? should they not screw?
V-ing form
should I not be screwing? should you not be screwing? should he not be screwing? should we not be screwing? should you not be screwing? should they not be screwing?
Perfect
should I not have screwed? should you not have screwed? should he not have screwed? should we not have screwed? should you not have screwed? should they not have screwed?
V-ing perfect
should I not have been screwing? should you not have been screwing? should he not have been screwing? should we not have been screwing? should you not have been screwing? should they not have been screwing?