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