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