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