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