I'd be crouching you'd be crouching he'd be crouching we'd be crouching you'd be crouching they'd be crouching
Perfect
I should've crouched you should've crouched he should've crouched we should've crouched you should've crouched they should've crouched
V-ing perfect
I should've been crouching you should've been crouching he should've been crouching we should've been crouching you should've been crouching they should've been crouching
Negation
Simple form
I shouldn't crouch you shouldn't crouch he shouldn't crouch we shouldn't crouch you shouldn't crouch they shouldn't crouch
V-ing form
I shouldn't be crouching you shouldn't be crouching he shouldn't be crouching we shouldn't be crouching you shouldn't be crouching they shouldn't be crouching
Perfect
I shouldn't have crouched you shouldn't have crouched he shouldn't have crouched we shouldn't have crouched you shouldn't have crouched they shouldn't have crouched
V-ing perfect
I shouldn't have been crouching you shouldn't have been crouching he shouldn't have been crouching we shouldn't have been crouching you shouldn't have been crouching they shouldn't have been crouching
Interrogative form
Simple form
should I crouch? should you crouch? should he crouch? should we crouch? should you crouch? should they crouch?
V-ing form
should I be crouching? should you be crouching? should he be crouching? should we be crouching? should you be crouching? should they be crouching?
Perfect
should I have crouched? should you have crouched? should he have crouched? should we have crouched? should you have crouched? should they have crouched?
V-ing perfect
should I have been crouching? should you have been crouching? should he have been crouching? should we have been crouching? should you have been crouching? should they have been crouching?
Interro-negative form
Simple form
shouldn't I crouch? shouldn't you crouch? shouldn't he crouch? shouldn't we crouch? shouldn't you crouch? shouldn't they crouch?
V-ing form
shouldn't I be crouching? shouldn't you be crouching? shouldn't he be crouching? shouldn't we be crouching? shouldn't you be crouching? shouldn't they be crouching?
Perfect
shouldn't I have crouched? shouldn't you have crouched? shouldn't he have crouched? shouldn't we have crouched? shouldn't you have crouched? shouldn't they have crouched?
V-ing perfect
shouldn't I have been crouching? shouldn't you have been crouching? shouldn't he have been crouching? shouldn't we have been crouching? shouldn't you have been crouching? shouldn't they have been crouching?