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