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