I may decay you may decay she may decay we may decay you may decay they may decay
V-ing form
I may be decaying you may be decaying she may be decaying we may be decaying you may be decaying they may be decaying
Perfect
I may have decayed you may have decayed she 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 she may have been decaying we may have been decaying you may have been decaying they may have been decaying
Negation
Simple form
I mayn't decay you mayn't decay she mayn't decay we mayn't decay you mayn't decay they mayn't decay
V-ing form
I mayn't be decaying you mayn't be decaying she mayn't be decaying we mayn't be decaying you mayn't be decaying they mayn't be decaying
Perfect
I mayn't have decayed you mayn't have decayed she mayn't have decayed we mayn't have decayed you mayn't have decayed they mayn't have decayed
V-ing perfect
I mayn't have been decaying you mayn't have been decaying she mayn't have been decaying we mayn't have been decaying you mayn't have been decaying they mayn't have been decaying
Interrogative form
Simple form
may I decay? may you decay? may she decay? may we decay? may you decay? may they decay?
V-ing form
may I be decaying? may you be decaying? may she be decaying? may we be decaying? may you be decaying? may they be decaying?
Perfect
may I have decayed? may you have decayed? may she 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 she have been decaying? may we have been decaying? may you have been decaying? may they have been decaying?
Interro-negative form
Simple form
mayn't I decay? mayn't you decay? mayn't she decay? mayn't we decay? mayn't you decay? mayn't they decay?
V-ing form
mayn't I be decaying? mayn't you be decaying? mayn't she be decaying? mayn't we be decaying? mayn't you be decaying? mayn't they be decaying?
Perfect
mayn't I have decayed? mayn't you have decayed? mayn't she have decayed? mayn't we have decayed? mayn't you have decayed? mayn't they have decayed?
V-ing perfect
mayn't I have been decaying? mayn't you have been decaying? mayn't she have been decaying? mayn't we have been decaying? mayn't you have been decaying? mayn't they have been decaying?