English verb conjugation
MAY FOIL

Regular verb: foil - foiled - foiled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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