may subtract
Regular verb: subtract - subtracted- subtracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may subtract
you may subtract
she may subtract
we may subtract
you may subtract
they may subtract 	I may be subtracting
you may be subtracting
she may be subtracting
we may be subtracting
you may be subtracting
they may be subtracting	I may have subtracted
you may have subtracted
she may have subtracted
we may have subtracted
you may have subtracted
they may have subtracted	I may have been subtracting
you may have been subtracting
she may have been subtracting
we may have been subtracting
you may have been subtracting
they may have been subtracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't subtract
you mayn't subtract
she mayn't subtract
we mayn't subtract
you mayn't subtract
they mayn't subtract 	I mayn't be subtracting
you mayn't be subtracting
she mayn't be subtracting
we mayn't be subtracting
you mayn't be subtracting
they mayn't be subtracting	I mayn't have subtracted
you mayn't have subtracted
she mayn't have subtracted
we mayn't have subtracted
you mayn't have subtracted
they mayn't have subtracted	I mayn't have been subtracting
you mayn't have been subtracting
she mayn't have been subtracting
we mayn't have been subtracting
you mayn't have been subtracting
they mayn't have been subtracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I subtract?
may you subtract?
may she subtract?
may we subtract?
may you subtract?
may they subtract? 	may I be subtracting?
may you be subtracting?
may she be subtracting?
may we be subtracting?
may you be subtracting?
may they be subtracting? 	may I have subtracted?
may you have subtracted?
may she have subtracted?
may we have subtracted?
may you have subtracted?
may they have subtracted? 	may I have been subtracting?
may you have been subtracting?
may she have been subtracting?
may we have been subtracting?
may you have been subtracting?
may they have been subtracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I subtract?
mayn't you subtract?
mayn't she subtract?
mayn't we subtract?
mayn't you subtract?
mayn't they subtract? 	mayn't I be subtracting?
mayn't you be subtracting?
mayn't she be subtracting?
mayn't we be subtracting?
mayn't you be subtracting?
mayn't they be subtracting? 	mayn't I have subtracted?
mayn't you have subtracted?
mayn't she have subtracted?
mayn't we have subtracted?
mayn't you have subtracted?
mayn't they have subtracted? 	mayn't I have been subtracting?
mayn't you have been subtracting?
mayn't she have been subtracting?
mayn't we have been subtracting?
mayn't you have been subtracting?
mayn't they have been subtracting?