I'd be gridironing you'd be gridironing she'd be gridironing we'd be gridironing you'd be gridironing they'd be gridironing
Perfect
I should've gridironed you should've gridironed she should've gridironed we should've gridironed you should've gridironed they should've gridironed
V-ing perfect
I should've been gridironing you should've been gridironing she should've been gridironing we should've been gridironing you should've been gridironing they should've been gridironing
Negation
Simple form
I shouldn't gridiron you shouldn't gridiron she shouldn't gridiron we shouldn't gridiron you shouldn't gridiron they shouldn't gridiron
V-ing form
I shouldn't be gridironing you shouldn't be gridironing she shouldn't be gridironing we shouldn't be gridironing you shouldn't be gridironing they shouldn't be gridironing
Perfect
I shouldn't have gridironed you shouldn't have gridironed she shouldn't have gridironed we shouldn't have gridironed you shouldn't have gridironed they shouldn't have gridironed
V-ing perfect
I shouldn't have been gridironing you shouldn't have been gridironing she shouldn't have been gridironing we shouldn't have been gridironing you shouldn't have been gridironing they shouldn't have been gridironing
Interrogative form
Simple form
should I gridiron? should you gridiron? should she gridiron? should we gridiron? should you gridiron? should they gridiron?
V-ing form
should I be gridironing? should you be gridironing? should she be gridironing? should we be gridironing? should you be gridironing? should they be gridironing?
Perfect
should I have gridironed? should you have gridironed? should she have gridironed? should we have gridironed? should you have gridironed? should they have gridironed?
V-ing perfect
should I have been gridironing? should you have been gridironing? should she have been gridironing? should we have been gridironing? should you have been gridironing? should they have been gridironing?
Interro-negative form
Simple form
shouldn't I gridiron? shouldn't you gridiron? shouldn't she gridiron? shouldn't we gridiron? shouldn't you gridiron? shouldn't they gridiron?
V-ing form
shouldn't I be gridironing? shouldn't you be gridironing? shouldn't she be gridironing? shouldn't we be gridironing? shouldn't you be gridironing? shouldn't they be gridironing?
Perfect
shouldn't I have gridironed? shouldn't you have gridironed? shouldn't she have gridironed? shouldn't we have gridironed? shouldn't you have gridironed? shouldn't they have gridironed?
V-ing perfect
shouldn't I have been gridironing? shouldn't you have been gridironing? shouldn't she have been gridironing? shouldn't we have been gridironing? shouldn't you have been gridironing? shouldn't they have been gridironing?