may quintuple
Regular verb: quintuple - quintupled- quintupled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may quintuple
you may quintuple
she may quintuple
we may quintuple
you may quintuple
they may quintuple 	I may be quintupling
you may be quintupling
she may be quintupling
we may be quintupling
you may be quintupling
they may be quintupling	I may have quintupled
you may have quintupled
she may have quintupled
we may have quintupled
you may have quintupled
they may have quintupled	I may have been quintupling
you may have been quintupling
she may have been quintupling
we may have been quintupling
you may have been quintupling
they may have been quintupling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't quintuple
you mayn't quintuple
she mayn't quintuple
we mayn't quintuple
you mayn't quintuple
they mayn't quintuple 	I mayn't be quintupling
you mayn't be quintupling
she mayn't be quintupling
we mayn't be quintupling
you mayn't be quintupling
they mayn't be quintupling	I mayn't have quintupled
you mayn't have quintupled
she mayn't have quintupled
we mayn't have quintupled
you mayn't have quintupled
they mayn't have quintupled	I mayn't have been quintupling
you mayn't have been quintupling
she mayn't have been quintupling
we mayn't have been quintupling
you mayn't have been quintupling
they mayn't have been quintupling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I quintuple?
may you quintuple?
may she quintuple?
may we quintuple?
may you quintuple?
may they quintuple? 	may I be quintupling?
may you be quintupling?
may she be quintupling?
may we be quintupling?
may you be quintupling?
may they be quintupling? 	may I have quintupled?
may you have quintupled?
may she have quintupled?
may we have quintupled?
may you have quintupled?
may they have quintupled? 	may I have been quintupling?
may you have been quintupling?
may she have been quintupling?
may we have been quintupling?
may you have been quintupling?
may they have been quintupling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I quintuple?
mayn't you quintuple?
mayn't she quintuple?
mayn't we quintuple?
mayn't you quintuple?
mayn't they quintuple? 	mayn't I be quintupling?
mayn't you be quintupling?
mayn't she be quintupling?
mayn't we be quintupling?
mayn't you be quintupling?
mayn't they be quintupling? 	mayn't I have quintupled?
mayn't you have quintupled?
mayn't she have quintupled?
mayn't we have quintupled?
mayn't you have quintupled?
mayn't they have quintupled? 	mayn't I have been quintupling?
mayn't you have been quintupling?
mayn't she have been quintupling?
mayn't we have been quintupling?
mayn't you have been quintupling?
mayn't they have been quintupling?