may vary
Regular verb: vary - varied- varied

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