may forewarn
Regular verb: forewarn - forewarned- forewarned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may forewarn
you may forewarn
he may forewarn
we may forewarn
you may forewarn
they may forewarn 	I may be forewarning
you may be forewarning
he may be forewarning
we may be forewarning
you may be forewarning
they may be forewarning	I may have forewarned
you may have forewarned
he may have forewarned
we may have forewarned
you may have forewarned
they may have forewarned	I may have been forewarning
you may have been forewarning
he may have been forewarning
we may have been forewarning
you may have been forewarning
they may have been forewarning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't forewarn
you mayn't forewarn
he mayn't forewarn
we mayn't forewarn
you mayn't forewarn
they mayn't forewarn 	I mayn't be forewarning
you mayn't be forewarning
he mayn't be forewarning
we mayn't be forewarning
you mayn't be forewarning
they mayn't be forewarning	I mayn't have forewarned
you mayn't have forewarned
he mayn't have forewarned
we mayn't have forewarned
you mayn't have forewarned
they mayn't have forewarned	I mayn't have been forewarning
you mayn't have been forewarning
he mayn't have been forewarning
we mayn't have been forewarning
you mayn't have been forewarning
they mayn't have been forewarning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I forewarn?
may you forewarn?
may he forewarn?
may we forewarn?
may you forewarn?
may they forewarn? 	may I be forewarning?
may you be forewarning?
may he be forewarning?
may we be forewarning?
may you be forewarning?
may they be forewarning? 	may I have forewarned?
may you have forewarned?
may he have forewarned?
may we have forewarned?
may you have forewarned?
may they have forewarned? 	may I have been forewarning?
may you have been forewarning?
may he have been forewarning?
may we have been forewarning?
may you have been forewarning?
may they have been forewarning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I forewarn?
mayn't you forewarn?
mayn't he forewarn?
mayn't we forewarn?
mayn't you forewarn?
mayn't they forewarn? 	mayn't I be forewarning?
mayn't you be forewarning?
mayn't he be forewarning?
mayn't we be forewarning?
mayn't you be forewarning?
mayn't they be forewarning? 	mayn't I have forewarned?
mayn't you have forewarned?
mayn't he have forewarned?
mayn't we have forewarned?
mayn't you have forewarned?
mayn't they have forewarned? 	mayn't I have been forewarning?
mayn't you have been forewarning?
mayn't he have been forewarning?
mayn't we have been forewarning?
mayn't you have been forewarning?
mayn't they have been forewarning?