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