I'd be replacing you'd be replacing she'd be replacing we'd be replacing you'd be replacing they'd be replacing
Perfect
I should've replaced you should've replaced she should've replaced we should've replaced you should've replaced they should've replaced
V-ing perfect
I should've been replacing you should've been replacing she should've been replacing we should've been replacing you should've been replacing they should've been replacing
Negation
Simple form
I shouldn't replace you shouldn't replace she shouldn't replace we shouldn't replace you shouldn't replace they shouldn't replace
V-ing form
I shouldn't be replacing you shouldn't be replacing she shouldn't be replacing we shouldn't be replacing you shouldn't be replacing they shouldn't be replacing
Perfect
I shouldn't have replaced you shouldn't have replaced she shouldn't have replaced we shouldn't have replaced you shouldn't have replaced they shouldn't have replaced
V-ing perfect
I shouldn't have been replacing you shouldn't have been replacing she shouldn't have been replacing we shouldn't have been replacing you shouldn't have been replacing they shouldn't have been replacing
Interrogative form
Simple form
should I replace? should you replace? should she replace? should we replace? should you replace? should they replace?
V-ing form
should I be replacing? should you be replacing? should she be replacing? should we be replacing? should you be replacing? should they be replacing?
Perfect
should I have replaced? should you have replaced? should she have replaced? should we have replaced? should you have replaced? should they have replaced?
V-ing perfect
should I have been replacing? should you have been replacing? should she have been replacing? should we have been replacing? should you have been replacing? should they have been replacing?
Interro-negative form
Simple form
shouldn't I replace? shouldn't you replace? shouldn't she replace? shouldn't we replace? shouldn't you replace? shouldn't they replace?
V-ing form
shouldn't I be replacing? shouldn't you be replacing? shouldn't she be replacing? shouldn't we be replacing? shouldn't you be replacing? shouldn't they be replacing?
Perfect
shouldn't I have replaced? shouldn't you have replaced? shouldn't she have replaced? shouldn't we have replaced? shouldn't you have replaced? shouldn't they have replaced?
V-ing perfect
shouldn't I have been replacing? shouldn't you have been replacing? shouldn't she have been replacing? shouldn't we have been replacing? shouldn't you have been replacing? shouldn't they have been replacing?