English verb conjugation
OUGHT TO FOIL

Regular verb: foil - foiled - foiled

Affirmation

Simple form	V-ing form
I ought to foil you ought to foil he ought to foil we ought to foil you ought to foil they ought to foil	I ought to be foiling you ought to be foiling he ought to be foiling we ought to be foiling you ought to be foiling they ought to be foiling
Perfect	V-ing perfect
I ought to have foiled you ought to have foiled he ought to have foiled we ought to have foiled you ought to have foiled they ought to have foiled	I ought to have been foiling you ought to have been foiling he ought to have been foiling we ought to have been foiling you ought to have been foiling they ought to have been foiling

Negation

Simple form	V-ing form
I oughtn't to foil you oughtn't to foil he oughtn't to foil we oughtn't to foil you oughtn't to foil they oughtn't to foil	I oughtn't to be foiling you oughtn't to be foiling he oughtn't to be foiling we oughtn't to be foiling you oughtn't to be foiling they oughtn't to be foiling
Perfect	V-ing perfect
I oughtn't to have foiled you oughtn't to have foiled he oughtn't to have foiled we oughtn't to have foiled you oughtn't to have foiled they oughtn't to have foiled	I oughtn't to have been foiling you oughtn't to have been foiling he oughtn't to have been foiling we oughtn't to have been foiling you oughtn't to have been foiling they oughtn't to have been foiling

Interrogative form

Simple form	V-ing form
ought to I foil? ought to you foil? ought to he foil? ought to we foil? ought to you foil? ought to they foil?	ought to I be foiling? ought to you be foiling? ought to he be foiling? ought to we be foiling? ought to you be foiling? ought to they be foiling?
Perfect	V-ing perfect
ought to I have foiled? ought to you have foiled? ought to he have foiled? ought to we have foiled? ought to you have foiled? ought to they have foiled?	ought to I have been foiling? ought to you have been foiling? ought to he have been foiling? ought to we have been foiling? ought to you have been foiling? ought to they have been foiling?

Interro-negative form

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