English verb conjugation
MAY WARN

Regular verb: warn - warned - warned

Affirmation

Simple form	V-ing form
I may warn you may warn she may warn we may warn you may warn they may warn	I may be warning you may be warning she may be warning we may be warning you may be warning they may be warning
Perfect	V-ing perfect
I may have warned you may have warned she may have warned we may have warned you may have warned they may have warned	I may have been warning you may have been warning she may have been warning we may have been warning you may have been warning they may have been warning

Negation

Simple form	V-ing form
I mayn't warn you mayn't warn she mayn't warn we mayn't warn you mayn't warn they mayn't warn	I mayn't be warning you mayn't be warning she mayn't be warning we mayn't be warning you mayn't be warning they mayn't be warning
Perfect	V-ing perfect
I mayn't have warned you mayn't have warned she mayn't have warned we mayn't have warned you mayn't have warned they mayn't have warned	I mayn't have been warning you mayn't have been warning she mayn't have been warning we mayn't have been warning you mayn't have been warning they mayn't have been warning

Interrogative form

Simple form	V-ing form
may I warn? may you warn? may she warn? may we warn? may you warn? may they warn?	may I be warning? may you be warning? may she be warning? may we be warning? may you be warning? may they be warning?
Perfect	V-ing perfect
may I have warned? may you have warned? may she have warned? may we have warned? may you have warned? may they have warned?	may I have been warning? may you have been warning? may she have been warning? may we have been warning? may you have been warning? may they have been warning?

Interro-negative form

Simple form	V-ing form
mayn't I warn? mayn't you warn? mayn't she warn? mayn't we warn? mayn't you warn? mayn't they warn?	mayn't I be warning? mayn't you be warning? mayn't she be warning? mayn't we be warning? mayn't you be warning? mayn't they be warning?
Perfect	V-ing perfect
mayn't I have warned? mayn't you have warned? mayn't she have warned? mayn't we have warned? mayn't you have warned? mayn't they have warned?	mayn't I have been warning? mayn't you have been warning? mayn't she have been warning? mayn't we have been warning? mayn't you have been warning? mayn't they have been warning?