English verb conjugation
MAY VARY

Regular verb: vary - varied - varied

Affirmation

Simple form	V-ing form
I may vary you may vary he may vary we may vary you may vary they may vary	I may be varying you may be varying he may be varying we may be varying you may be varying they may be varying
Perfect	V-ing perfect
I may have varied you may have varied he may have varied we may have varied you may have varied they may have varied	I may have been varying you may have been varying he may have been varying we may have been varying you may have been varying they may have been varying

Negation

Simple form	V-ing form
I mayn't vary you mayn't vary he mayn't vary we mayn't vary you mayn't vary they mayn't vary	I mayn't be varying you mayn't be varying he mayn't be varying we mayn't be varying you mayn't be varying they mayn't be varying
Perfect	V-ing perfect
I mayn't have varied you mayn't have varied he mayn't have varied we mayn't have varied you mayn't have varied they mayn't have varied	I mayn't have been varying you mayn't have been varying he mayn't have been varying we mayn't have been varying you mayn't have been varying they mayn't have been varying

Interrogative form

Simple form	V-ing form
may I vary? may you vary? may he vary? may we vary? may you vary? may they vary?	may I be varying? may you be varying? may he be varying? may we be varying? may you be varying? may they be varying?
Perfect	V-ing perfect
may I have varied? may you have varied? may he have varied? may we have varied? may you have varied? may they have varied?	may I have been varying? may you have been varying? may he have been varying? may we have been varying? may you have been varying? may they have been varying?

Interro-negative form

Simple form	V-ing form
mayn't I vary? mayn't you vary? mayn't he vary? mayn't we vary? mayn't you vary? mayn't they vary?	mayn't I be varying? mayn't you be varying? mayn't he be varying? mayn't we be varying? mayn't you be varying? mayn't they be varying?
Perfect	V-ing perfect
mayn't I have varied? mayn't you have varied? mayn't he have varied? mayn't we have varied? mayn't you have varied? mayn't they have varied?	mayn't I have been varying? mayn't you have been varying? mayn't he have been varying? mayn't we have been varying? mayn't you have been varying? mayn't they have been varying?