I may decay you may decay he may decay we may decay you may decay they may decay
V-ing form
I may be decaying you may be decaying he may be decaying we may be decaying you may be decaying they may be decaying
Perfect
I may have decayed you may have decayed he may have decayed we may have decayed you may have decayed they may have decayed
V-ing perfect
I may have been decaying you may have been decaying he may have been decaying we may have been decaying you may have been decaying they may have been decaying
Negation
Simple form
I may not decay you may not decay he may not decay we may not decay you may not decay they may not decay
V-ing form
I may not be decaying you may not be decaying he may not be decaying we may not be decaying you may not be decaying they may not be decaying
Perfect
I may not have decayed you may not have decayed he may not have decayed we may not have decayed you may not have decayed they may not have decayed
V-ing perfect
I may not have been decaying you may not have been decaying he may not have been decaying we may not have been decaying you may not have been decaying they may not have been decaying
Interrogative form
Simple form
may I decay? may you decay? may he decay? may we decay? may you decay? may they decay?
V-ing form
may I be decaying? may you be decaying? may he be decaying? may we be decaying? may you be decaying? may they be decaying?
Perfect
may I have decayed? may you have decayed? may he have decayed? may we have decayed? may you have decayed? may they have decayed?
V-ing perfect
may I have been decaying? may you have been decaying? may he have been decaying? may we have been decaying? may you have been decaying? may they have been decaying?
Interro-negative form
Simple form
may I not decay? may you not decay? may he not decay? may we not decay? may you not decay? may they not decay?
V-ing form
may I not be decaying? may you not be decaying? may he not be decaying? may we not be decaying? may you not be decaying? may they not be decaying?
Perfect
may I not have decayed? may you not have decayed? may he not have decayed? may we not have decayed? may you not have decayed? may they not have decayed?
V-ing perfect
may I not have been decaying? may you not have been decaying? may he not have been decaying? may we not have been decaying? may you not have been decaying? may they not have been decaying?