English verb conjugation
SHOULD FOIL

Regular verb: foil - foiled - foiled

Affirmation

Simple form	V-ing form
I'd foil you'd foil she'd foil we'd foil you'd foil they'd foil	I'd be foiling you'd be foiling she'd be foiling we'd be foiling you'd be foiling they'd be foiling
Perfect	V-ing perfect
I should've foiled you should've foiled she should've foiled we should've foiled you should've foiled they should've foiled	I should've been foiling you should've been foiling she should've been foiling we should've been foiling you should've been foiling they should've been foiling

Negation

Simple form	V-ing form
I shouldn't foil you shouldn't foil she shouldn't foil we shouldn't foil you shouldn't foil they shouldn't foil	I shouldn't be foiling you shouldn't be foiling she shouldn't be foiling we shouldn't be foiling you shouldn't be foiling they shouldn't be foiling
Perfect	V-ing perfect
I shouldn't have foiled you shouldn't have foiled she shouldn't have foiled we shouldn't have foiled you shouldn't have foiled they shouldn't have foiled	I shouldn't have been foiling you shouldn't have been foiling she shouldn't have been foiling we shouldn't have been foiling you shouldn't have been foiling they shouldn't have been foiling

Interrogative form

Simple form	V-ing form
should I foil? should you foil? should she foil? should we foil? should you foil? should they foil?	should I be foiling? should you be foiling? should she be foiling? should we be foiling? should you be foiling? should they be foiling?
Perfect	V-ing perfect
should I have foiled? should you have foiled? should she have foiled? should we have foiled? should you have foiled? should they have foiled?	should I have been foiling? should you have been foiling? should she have been foiling? should we have been foiling? should you have been foiling? should they have been foiling?

Interro-negative form

Simple form	V-ing form
shouldn't I foil? shouldn't you foil? shouldn't she foil? shouldn't we foil? shouldn't you foil? shouldn't they foil?	shouldn't I be foiling? shouldn't you be foiling? shouldn't she be foiling? shouldn't we be foiling? shouldn't you be foiling? shouldn't they be foiling?
Perfect	V-ing perfect
shouldn't I have foiled? shouldn't you have foiled? shouldn't she have foiled? shouldn't we have foiled? shouldn't you have foiled? shouldn't they have foiled?	shouldn't I have been foiling? shouldn't you have been foiling? shouldn't she have been foiling? shouldn't we have been foiling? shouldn't you have been foiling? shouldn't they have been foiling?