English verb conjugation
SHOULD RET

Regular verb: ret - retted - retted

Affirmation

Simple form	V-ing form
I'd ret you'd ret he'd ret we'd ret you'd ret they'd ret	I'd be retting you'd be retting he'd be retting we'd be retting you'd be retting they'd be retting
Perfect	V-ing perfect
I should've retted you should've retted he should've retted we should've retted you should've retted they should've retted	I should've been retting you should've been retting he should've been retting we should've been retting you should've been retting they should've been retting

Negation

Simple form	V-ing form
I shouldn't ret you shouldn't ret he shouldn't ret we shouldn't ret you shouldn't ret they shouldn't ret	I shouldn't be retting you shouldn't be retting he shouldn't be retting we shouldn't be retting you shouldn't be retting they shouldn't be retting
Perfect	V-ing perfect
I shouldn't have retted you shouldn't have retted he shouldn't have retted we shouldn't have retted you shouldn't have retted they shouldn't have retted	I shouldn't have been retting you shouldn't have been retting he shouldn't have been retting we shouldn't have been retting you shouldn't have been retting they shouldn't have been retting

Interrogative form

Simple form	V-ing form
should I ret? should you ret? should he ret? should we ret? should you ret? should they ret?	should I be retting? should you be retting? should he be retting? should we be retting? should you be retting? should they be retting?
Perfect	V-ing perfect
should I have retted? should you have retted? should he have retted? should we have retted? should you have retted? should they have retted?	should I have been retting? should you have been retting? should he have been retting? should we have been retting? should you have been retting? should they have been retting?

Interro-negative form

Simple form	V-ing form
shouldn't I ret? shouldn't you ret? shouldn't he ret? shouldn't we ret? shouldn't you ret? shouldn't they ret?	shouldn't I be retting? shouldn't you be retting? shouldn't he be retting? shouldn't we be retting? shouldn't you be retting? shouldn't they be retting?
Perfect	V-ing perfect
shouldn't I have retted? shouldn't you have retted? shouldn't he have retted? shouldn't we have retted? shouldn't you have retted? shouldn't they have retted?	shouldn't I have been retting? shouldn't you have been retting? shouldn't he have been retting? shouldn't we have been retting? shouldn't you have been retting? shouldn't they have been retting?