English verb conjugation
MAY MODIFY

Regular verb: modify - modified - modified

Affirmation

Simple form	V-ing form
I may modify you may modify he may modify we may modify you may modify they may modify	I may be modifying you may be modifying he may be modifying we may be modifying you may be modifying they may be modifying
Perfect	V-ing perfect
I may have modified you may have modified he 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 he 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
I mayn't modify you mayn't modify he mayn't modify we mayn't modify you mayn't modify they mayn't modify	I mayn't be modifying you mayn't be modifying he mayn't be modifying we mayn't be modifying you mayn't be modifying they mayn't be modifying
Perfect	V-ing perfect
I mayn't have modified you mayn't have modified he mayn't have modified we mayn't have modified you mayn't have modified they mayn't have modified	I mayn't have been modifying you mayn't have been modifying he mayn't have been modifying we mayn't have been modifying you mayn't have been modifying they mayn't have been modifying

Interrogative form

Simple form	V-ing form
may I modify? may you modify? may he modify? may we modify? may you modify? may they modify?	may I be modifying? may you be modifying? may he be modifying? may we be modifying? may you be modifying? may they be modifying?
Perfect	V-ing perfect
may I have modified? may you have modified? may he 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 he 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
mayn't I modify? mayn't you modify? mayn't he modify? mayn't we modify? mayn't you modify? mayn't they modify?	mayn't I be modifying? mayn't you be modifying? mayn't he be modifying? mayn't we be modifying? mayn't you be modifying? mayn't they be modifying?
Perfect	V-ing perfect
mayn't I have modified? mayn't you have modified? mayn't he have modified? mayn't we have modified? mayn't you have modified? mayn't they have modified?	mayn't I have been modifying? mayn't you have been modifying? mayn't he have been modifying? mayn't we have been modifying? mayn't you have been modifying? mayn't they have been modifying?