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