may prewarn
Regular verb: prewarn - prewarned- prewarned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may prewarn
you may prewarn
she may prewarn
we may prewarn
you may prewarn
they may prewarn 	I may be prewarning
you may be prewarning
she may be prewarning
we may be prewarning
you may be prewarning
they may be prewarning	I may have prewarned
you may have prewarned
she may have prewarned
we may have prewarned
you may have prewarned
they may have prewarned	I may have been prewarning
you may have been prewarning
she may have been prewarning
we may have been prewarning
you may have been prewarning
they may have been prewarning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't prewarn
you mayn't prewarn
she mayn't prewarn
we mayn't prewarn
you mayn't prewarn
they mayn't prewarn 	I mayn't be prewarning
you mayn't be prewarning
she mayn't be prewarning
we mayn't be prewarning
you mayn't be prewarning
they mayn't be prewarning	I mayn't have prewarned
you mayn't have prewarned
she mayn't have prewarned
we mayn't have prewarned
you mayn't have prewarned
they mayn't have prewarned	I mayn't have been prewarning
you mayn't have been prewarning
she mayn't have been prewarning
we mayn't have been prewarning
you mayn't have been prewarning
they mayn't have been prewarning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I prewarn?
may you prewarn?
may she prewarn?
may we prewarn?
may you prewarn?
may they prewarn? 	may I be prewarning?
may you be prewarning?
may she be prewarning?
may we be prewarning?
may you be prewarning?
may they be prewarning? 	may I have prewarned?
may you have prewarned?
may she have prewarned?
may we have prewarned?
may you have prewarned?
may they have prewarned? 	may I have been prewarning?
may you have been prewarning?
may she have been prewarning?
may we have been prewarning?
may you have been prewarning?
may they have been prewarning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I prewarn?
mayn't you prewarn?
mayn't she prewarn?
mayn't we prewarn?
mayn't you prewarn?
mayn't they prewarn? 	mayn't I be prewarning?
mayn't you be prewarning?
mayn't she be prewarning?
mayn't we be prewarning?
mayn't you be prewarning?
mayn't they be prewarning? 	mayn't I have prewarned?
mayn't you have prewarned?
mayn't she have prewarned?
mayn't we have prewarned?
mayn't you have prewarned?
mayn't they have prewarned? 	mayn't I have been prewarning?
mayn't you have been prewarning?
mayn't she have been prewarning?
mayn't we have been prewarning?
mayn't you have been prewarning?
mayn't they have been prewarning?