I may warn you may warn he may warn we may warn you may warn they may warn
V-ing form
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
I may have warned you may have warned he may have warned we may have warned you may have warned they may have warned
V-ing perfect
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
I may not warn you may not warn he may not warn we may not warn you may not warn they may not warn
V-ing form
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
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
V-ing perfect
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
may I warn? may you warn? may he warn? may we warn? may you warn? may they warn?
V-ing form
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
may I have warned? may you have warned? may he have warned? may we have warned? may you have warned? may they have warned?
V-ing perfect
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
may I not warn? may you not warn? may he not warn? may we not warn? may you not warn? may they not warn?
V-ing form
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
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?
V-ing perfect
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?