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