English verb conjugation
MAY WARN

Regular verb: warn - warned - warned

Affirmation

Simple form	V-ing form
I may warn you may warn he may warn we may warn you may warn they may warn	I may be warning you may be warning he 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 he 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 he 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 he 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 he 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 he 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 he 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 he warn? may we warn? may you warn? may they warn?	may I be warning? may you be warning? may he 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 he 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 he 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 he 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 he 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 he 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 he have been warning? mayn't we have been warning? mayn't you have been warning? mayn't they have been warning?