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