English verb conjugation
SHOULD RET

Regular verb: ret - retted - retted

Affirmation

Simple form	V-ing form
I'd ret you'd ret she'd ret we'd ret you'd ret they'd ret	I'd be retting you'd be retting she'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 she 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 she 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 she 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 she 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 she 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 she 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 she ret? should we ret? should you ret? should they ret?	should I be retting? should you be retting? should she 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 she 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 she 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 she 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 she 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 she 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 she have been retting? shouldn't we have been retting? shouldn't you have been retting? shouldn't they have been retting?