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