English verb conjugation
MUST FOIL

Regular verb: foil - foiled - foiled

Affirmation

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

Negation

Simple form	V-ing form
I must not foil you must not foil she must not foil we must not foil you must not foil they must not foil	I must not be foiling you must not be foiling she must not be foiling we must not be foiling you must not be foiling they must not be foiling
Perfect	V-ing perfect
I must not have foiled you must not have foiled she must not have foiled we must not have foiled you must not have foiled they must not have foiled	I must not have been foiling you must not have been foiling she must not have been foiling we must not have been foiling you must not have been foiling they must not have been foiling

Interrogative form

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

Interro-negative form

Simple form	V-ing form
must I not foil? must you not foil? must she not foil? must we not foil? must you not foil? must they not foil?	must I not be foiling? must you not be foiling? must she not be foiling? must we not be foiling? must you not be foiling? must they not be foiling?
Perfect	V-ing perfect
must I not have foiled? must you not have foiled? must she not have foiled? must we not have foiled? must you not have foiled? must they not have foiled?	must I not have been foiling? must you not have been foiling? must she not have been foiling? must we not have been foiling? must you not have been foiling? must they not have been foiling?