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