I'd be sinking you'd be sinking she'd be sinking we'd be sinking you'd be sinking they'd be sinking
Perfect
I should've sunk you should've sunk she 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 she 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 she 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 she 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 she 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 she 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 she sink? should we sink? should you sink? should they sink?
V-ing form
should I be sinking? should you be sinking? should she be sinking? should we be sinking? should you be sinking? should they be sinking?
Perfect
should I have sunk? should you have sunk? should she 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 she 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 she 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 she 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 she 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 she have been sinking? shouldn't we have been sinking? shouldn't you have been sinking? shouldn't they have been sinking?