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