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