English verb conjugation
MAY SUB

Regular verb: sub - subbed - subbed

Affirmation

Simple form	V-ing form
I may sub you may sub he may sub we may sub you may sub they may sub	I may be subbing you may be subbing he may be subbing we may be subbing you may be subbing they may be subbing
Perfect	V-ing perfect
I may have subbed you may have subbed he may have subbed we may have subbed you may have subbed they may have subbed	I may have been subbing you may have been subbing he may have been subbing we may have been subbing you may have been subbing they may have been subbing

Negation

Simple form	V-ing form
I mayn't sub you mayn't sub he mayn't sub we mayn't sub you mayn't sub they mayn't sub	I mayn't be subbing you mayn't be subbing he mayn't be subbing we mayn't be subbing you mayn't be subbing they mayn't be subbing
Perfect	V-ing perfect
I mayn't have subbed you mayn't have subbed he mayn't have subbed we mayn't have subbed you mayn't have subbed they mayn't have subbed	I mayn't have been subbing you mayn't have been subbing he mayn't have been subbing we mayn't have been subbing you mayn't have been subbing they mayn't have been subbing

Interrogative form

Simple form	V-ing form
may I sub? may you sub? may he sub? may we sub? may you sub? may they sub?	may I be subbing? may you be subbing? may he be subbing? may we be subbing? may you be subbing? may they be subbing?
Perfect	V-ing perfect
may I have subbed? may you have subbed? may he have subbed? may we have subbed? may you have subbed? may they have subbed?	may I have been subbing? may you have been subbing? may he have been subbing? may we have been subbing? may you have been subbing? may they have been subbing?

Interro-negative form

Simple form	V-ing form
mayn't I sub? mayn't you sub? mayn't he sub? mayn't we sub? mayn't you sub? mayn't they sub?	mayn't I be subbing? mayn't you be subbing? mayn't he be subbing? mayn't we be subbing? mayn't you be subbing? mayn't they be subbing?
Perfect	V-ing perfect
mayn't I have subbed? mayn't you have subbed? mayn't he have subbed? mayn't we have subbed? mayn't you have subbed? mayn't they have subbed?	mayn't I have been subbing? mayn't you have been subbing? mayn't he have been subbing? mayn't we have been subbing? mayn't you have been subbing? mayn't they have been subbing?