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 may not vary you may not vary he may not vary we may not vary you may not vary they may not vary	I may not be varying you may not be varying he may not be varying we may not be varying you may not be varying they may not be varying
Perfect	V-ing perfect
I may not have varied you may not have varied he may not have varied we may not have varied you may not have varied they may not have varied	I may not have been varying you may not have been varying he may not have been varying we may not have been varying you may not have been varying they may not 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
may I not vary? may you not vary? may he not vary? may we not vary? may you not vary? may they not vary?	may I not be varying? may you not be varying? may he not be varying? may we not be varying? may you not be varying? may they not be varying?
Perfect	V-ing perfect
may I not have varied? may you not have varied? may he not have varied? may we not have varied? may you not have varied? may they not have varied?	may I not have been varying? may you not have been varying? may he not have been varying? may we not have been varying? may you not have been varying? may they not have been varying?