
Regular verb: sigh - sighed - sighed
Simple form | V-ing form | 
| I'd sigh you'd sigh she'd sigh we'd sigh you'd sigh they'd sigh  | I'd be sighing you'd be sighing she'd be sighing we'd be sighing you'd be sighing they'd be sighing  | 
Perfect | V-ing perfect | 
| I should've sighed you should've sighed she should've sighed we should've sighed you should've sighed they should've sighed  | I should've been sighing you should've been sighing she should've been sighing we should've been sighing you should've been sighing they should've been sighing  | 
Simple form | V-ing form | 
| I shouldn't sigh you shouldn't sigh she shouldn't sigh we shouldn't sigh you shouldn't sigh they shouldn't sigh  | I shouldn't be sighing you shouldn't be sighing she shouldn't be sighing we shouldn't be sighing you shouldn't be sighing they shouldn't be sighing  | 
Perfect | V-ing perfect | 
| I shouldn't have sighed you shouldn't have sighed she shouldn't have sighed we shouldn't have sighed you shouldn't have sighed they shouldn't have sighed  | I shouldn't have been sighing you shouldn't have been sighing she shouldn't have been sighing we shouldn't have been sighing you shouldn't have been sighing they shouldn't have been sighing  | 
Simple form | V-ing form | 
| should I sigh? should you sigh? should she sigh? should we sigh? should you sigh? should they sigh?  | should I be sighing? should you be sighing? should she be sighing? should we be sighing? should you be sighing? should they be sighing?  | 
Perfect | V-ing perfect | 
| should I have sighed? should you have sighed? should she have sighed? should we have sighed? should you have sighed? should they have sighed?  | should I have been sighing? should you have been sighing? should she have been sighing? should we have been sighing? should you have been sighing? should they have been sighing?  | 
Simple form | V-ing form | 
| shouldn't I sigh? shouldn't you sigh? shouldn't she sigh? shouldn't we sigh? shouldn't you sigh? shouldn't they sigh?  | shouldn't I be sighing? shouldn't you be sighing? shouldn't she be sighing? shouldn't we be sighing? shouldn't you be sighing? shouldn't they be sighing?  | 
Perfect | V-ing perfect | 
| shouldn't I have sighed? shouldn't you have sighed? shouldn't she have sighed? shouldn't we have sighed? shouldn't you have sighed? shouldn't they have sighed?  | shouldn't I have been sighing? shouldn't you have been sighing? shouldn't she have been sighing? shouldn't we have been sighing? shouldn't you have been sighing? shouldn't they have been sighing?  |