I may billow you may billow she may billow we may billow you may billow they may billow
V-ing form
I may be billowing you may be billowing she may be billowing we may be billowing you may be billowing they may be billowing
Perfect
I may have billowed you may have billowed she may have billowed we may have billowed you may have billowed they may have billowed
V-ing perfect
I may have been billowing you may have been billowing she may have been billowing we may have been billowing you may have been billowing they may have been billowing
Negation
Simple form
I may not billow you may not billow she may not billow we may not billow you may not billow they may not billow
V-ing form
I may not be billowing you may not be billowing she may not be billowing we may not be billowing you may not be billowing they may not be billowing
Perfect
I may not have billowed you may not have billowed she may not have billowed we may not have billowed you may not have billowed they may not have billowed
V-ing perfect
I may not have been billowing you may not have been billowing she may not have been billowing we may not have been billowing you may not have been billowing they may not have been billowing
Interrogative form
Simple form
may I billow? may you billow? may she billow? may we billow? may you billow? may they billow?
V-ing form
may I be billowing? may you be billowing? may she be billowing? may we be billowing? may you be billowing? may they be billowing?
Perfect
may I have billowed? may you have billowed? may she have billowed? may we have billowed? may you have billowed? may they have billowed?
V-ing perfect
may I have been billowing? may you have been billowing? may she have been billowing? may we have been billowing? may you have been billowing? may they have been billowing?
Interro-negative form
Simple form
may I not billow? may you not billow? may she not billow? may we not billow? may you not billow? may they not billow?
V-ing form
may I not be billowing? may you not be billowing? may she not be billowing? may we not be billowing? may you not be billowing? may they not be billowing?
Perfect
may I not have billowed? may you not have billowed? may she not have billowed? may we not have billowed? may you not have billowed? may they not have billowed?
V-ing perfect
may I not have been billowing? may you not have been billowing? may she not have been billowing? may we not have been billowing? may you not have been billowing? may they not have been billowing?