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 may not warn you may not warn he may not warn we may not warn you may not warn they may not warn	I may not be warning you may not be warning he may not be warning we may not be warning you may not be warning they may not be warning
Perfect	V-ing perfect
I may not have warned you may not have warned he may not have warned we may not have warned you may not have warned they may not have warned	I may not have been warning you may not have been warning he may not have been warning we may not have been warning you may not have been warning they may not 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
may I not warn? may you not warn? may he not warn? may we not warn? may you not warn? may they not warn?	may I not be warning? may you not be warning? may he not be warning? may we not be warning? may you not be warning? may they not be warning?
Perfect	V-ing perfect
may I not have warned? may you not have warned? may he not have warned? may we not have warned? may you not have warned? may they not have warned?	may I not have been warning? may you not have been warning? may he not have been warning? may we not have been warning? may you not have been warning? may they not have been warning?