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