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