may modify
Regular verb: modify - modified- modified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may modify
you may modify
she may modify
we may modify
you may modify
they may modify 	I may be modifying
you may be modifying
she may be modifying
we may be modifying
you may be modifying
they may be modifying	I may have modified
you may have modified
she may have modified
we may have modified
you may have modified
they may have modified	I may have been modifying
you may have been modifying
she may have been modifying
we may have been modifying
you may have been modifying
they may have been modifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not modify
you may not modify
she may not modify
we may not modify
you may not modify
they may not modify 	I may not be modifying
you may not be modifying
she may not be modifying
we may not be modifying
you may not be modifying
they may not be modifying	I may not have modified
you may not have modified
she may not have modified
we may not have modified
you may not have modified
they may not have modified	I may not have been modifying
you may not have been modifying
she may not have been modifying
we may not have been modifying
you may not have been modifying
they may not have been modifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I modify?
may you modify?
may she modify?
may we modify?
may you modify?
may they modify? 	may I be modifying?
may you be modifying?
may she be modifying?
may we be modifying?
may you be modifying?
may they be modifying? 	may I have modified?
may you have modified?
may she have modified?
may we have modified?
may you have modified?
may they have modified? 	may I have been modifying?
may you have been modifying?
may she have been modifying?
may we have been modifying?
may you have been modifying?
may they have been modifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not modify?
may you not modify?
may she not modify?
may we not modify?
may you not modify?
may they not modify? 	may I not be modifying?
may you not be modifying?
may she not be modifying?
may we not be modifying?
may you not be modifying?
may they not be modifying? 	may I not have modified?
may you not have modified?
may she not have modified?
may we not have modified?
may you not have modified?
may they not have modified? 	may I not have been modifying?
may you not have been modifying?
may she not have been modifying?
may we not have been modifying?
may you not have been modifying?
may they not have been modifying?