may double
Regular verb: double - doubled- doubled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may double
you may double
she may double
we may double
you may double
they may double 	I may be doubling
you may be doubling
she may be doubling
we may be doubling
you may be doubling
they may be doubling	I may have doubled
you may have doubled
she may have doubled
we may have doubled
you may have doubled
they may have doubled	I may have been doubling
you may have been doubling
she may have been doubling
we may have been doubling
you may have been doubling
they may have been doubling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not double
you may not double
she may not double
we may not double
you may not double
they may not double 	I may not be doubling
you may not be doubling
she may not be doubling
we may not be doubling
you may not be doubling
they may not be doubling	I may not have doubled
you may not have doubled
she may not have doubled
we may not have doubled
you may not have doubled
they may not have doubled	I may not have been doubling
you may not have been doubling
she may not have been doubling
we may not have been doubling
you may not have been doubling
they may not have been doubling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I double?
may you double?
may she double?
may we double?
may you double?
may they double? 	may I be doubling?
may you be doubling?
may she be doubling?
may we be doubling?
may you be doubling?
may they be doubling? 	may I have doubled?
may you have doubled?
may she have doubled?
may we have doubled?
may you have doubled?
may they have doubled? 	may I have been doubling?
may you have been doubling?
may she have been doubling?
may we have been doubling?
may you have been doubling?
may they have been doubling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not double?
may you not double?
may she not double?
may we not double?
may you not double?
may they not double? 	may I not be doubling?
may you not be doubling?
may she not be doubling?
may we not be doubling?
may you not be doubling?
may they not be doubling? 	may I not have doubled?
may you not have doubled?
may she not have doubled?
may we not have doubled?
may you not have doubled?
may they not have doubled? 	may I not have been doubling?
may you not have been doubling?
may she not have been doubling?
may we not have been doubling?
may you not have been doubling?
may they not have been doubling?