may decay
Regular verb: decay - decayed- decayed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may decay
you may decay
she may decay
we may decay
you may decay
they may decay 	I may be decaying
you may be decaying
she may be decaying
we may be decaying
you may be decaying
they may be decaying	I may have decayed
you may have decayed
she may have decayed
we may have decayed
you may have decayed
they may have decayed	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 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't decay
you mayn't decay
she mayn't decay
we mayn't decay
you mayn't decay
they mayn't decay 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
may I decay?
may you decay?
may she decay?
may we decay?
may you decay?
may they decay? 	may I be decaying?
may you be decaying?
may she be decaying?
may we be decaying?
may you be decaying?
may they be decaying? 	may I have decayed?
may you have decayed?
may she have decayed?
may we have decayed?
may you have decayed?
may they have decayed? 	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 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I decay?
mayn't you decay?
mayn't she decay?
mayn't we decay?
mayn't you decay?
mayn't they decay? 	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? 	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? 	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?