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