I'd be backfiting you'd be backfiting she'd be backfiting we'd be backfiting you'd be backfiting they'd be backfiting
Perfect
I should've backfit, backfitted you should've backfit, backfitted she should've backfit, backfitted we should've backfit, backfitted you should've backfit, backfitted they should've backfit, backfitted
V-ing perfect
I should've been backfiting you should've been backfiting she should've been backfiting we should've been backfiting you should've been backfiting they should've been backfiting
Negation
Simple form
I shouldn't backfit you shouldn't backfit she shouldn't backfit we shouldn't backfit you shouldn't backfit they shouldn't backfit
V-ing form
I shouldn't be backfiting you shouldn't be backfiting she shouldn't be backfiting we shouldn't be backfiting you shouldn't be backfiting they shouldn't be backfiting
Perfect
I shouldn't have backfit, backfitted you shouldn't have backfit, backfitted she shouldn't have backfit, backfitted we shouldn't have backfit, backfitted you shouldn't have backfit, backfitted they shouldn't have backfit, backfitted
V-ing perfect
I shouldn't have been backfiting you shouldn't have been backfiting she shouldn't have been backfiting we shouldn't have been backfiting you shouldn't have been backfiting they shouldn't have been backfiting
Interrogative form
Simple form
should I backfit? should you backfit? should she backfit? should we backfit? should you backfit? should they backfit?
V-ing form
should I be backfiting? should you be backfiting? should she be backfiting? should we be backfiting? should you be backfiting? should they be backfiting?
Perfect
should I have backfit, backfitted? should you have backfit, backfitted? should she have backfit, backfitted? should we have backfit, backfitted? should you have backfit, backfitted? should they have backfit, backfitted?
V-ing perfect
should I have been backfiting? should you have been backfiting? should she have been backfiting? should we have been backfiting? should you have been backfiting? should they have been backfiting?
Interro-negative form
Simple form
shouldn't I backfit? shouldn't you backfit? shouldn't she backfit? shouldn't we backfit? shouldn't you backfit? shouldn't they backfit?
V-ing form
shouldn't I be backfiting? shouldn't you be backfiting? shouldn't she be backfiting? shouldn't we be backfiting? shouldn't you be backfiting? shouldn't they be backfiting?
Perfect
shouldn't I have backfit, backfitted? shouldn't you have backfit, backfitted? shouldn't she have backfit, backfitted? shouldn't we have backfit, backfitted? shouldn't you have backfit, backfitted? shouldn't they have backfit, backfitted?
V-ing perfect
shouldn't I have been backfiting? shouldn't you have been backfiting? shouldn't she have been backfiting? shouldn't we have been backfiting? shouldn't you have been backfiting? shouldn't they have been backfiting?