English verb conjugation
SHOULD CURTAIN

Regular verb: curtain - curtained - curtained

Affirmation

Simple form	V-ing form
I'd curtain you'd curtain she'd curtain we'd curtain you'd curtain they'd curtain	I'd be curtaining you'd be curtaining she'd be curtaining we'd be curtaining you'd be curtaining they'd be curtaining
Perfect	V-ing perfect
I should've curtained you should've curtained she should've curtained we should've curtained you should've curtained they should've curtained	I should've been curtaining you should've been curtaining she should've been curtaining we should've been curtaining you should've been curtaining they should've been curtaining

Negation

Simple form	V-ing form
I shouldn't curtain you shouldn't curtain she shouldn't curtain we shouldn't curtain you shouldn't curtain they shouldn't curtain	I shouldn't be curtaining you shouldn't be curtaining she shouldn't be curtaining we shouldn't be curtaining you shouldn't be curtaining they shouldn't be curtaining
Perfect	V-ing perfect
I shouldn't have curtained you shouldn't have curtained she shouldn't have curtained we shouldn't have curtained you shouldn't have curtained they shouldn't have curtained	I shouldn't have been curtaining you shouldn't have been curtaining she shouldn't have been curtaining we shouldn't have been curtaining you shouldn't have been curtaining they shouldn't have been curtaining

Interrogative form

Simple form	V-ing form
should I curtain? should you curtain? should she curtain? should we curtain? should you curtain? should they curtain?	should I be curtaining? should you be curtaining? should she be curtaining? should we be curtaining? should you be curtaining? should they be curtaining?
Perfect	V-ing perfect
should I have curtained? should you have curtained? should she have curtained? should we have curtained? should you have curtained? should they have curtained?	should I have been curtaining? should you have been curtaining? should she have been curtaining? should we have been curtaining? should you have been curtaining? should they have been curtaining?

Interro-negative form

Simple form	V-ing form
shouldn't I curtain? shouldn't you curtain? shouldn't she curtain? shouldn't we curtain? shouldn't you curtain? shouldn't they curtain?	shouldn't I be curtaining? shouldn't you be curtaining? shouldn't she be curtaining? shouldn't we be curtaining? shouldn't you be curtaining? shouldn't they be curtaining?
Perfect	V-ing perfect
shouldn't I have curtained? shouldn't you have curtained? shouldn't she have curtained? shouldn't we have curtained? shouldn't you have curtained? shouldn't they have curtained?	shouldn't I have been curtaining? shouldn't you have been curtaining? shouldn't she have been curtaining? shouldn't we have been curtaining? shouldn't you have been curtaining? shouldn't they have been curtaining?