may treble
Regular verb: treble - trebled- trebled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may treble
you may treble
she may treble
we may treble
you may treble
they may treble 	I may be trebling
you may be trebling
she may be trebling
we may be trebling
you may be trebling
they may be trebling	I may have trebled
you may have trebled
she may have trebled
we may have trebled
you may have trebled
they may have trebled	I may have been trebling
you may have been trebling
she may have been trebling
we may have been trebling
you may have been trebling
they may have been trebling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't treble
you mayn't treble
she mayn't treble
we mayn't treble
you mayn't treble
they mayn't treble 	I mayn't be trebling
you mayn't be trebling
she mayn't be trebling
we mayn't be trebling
you mayn't be trebling
they mayn't be trebling	I mayn't have trebled
you mayn't have trebled
she mayn't have trebled
we mayn't have trebled
you mayn't have trebled
they mayn't have trebled	I mayn't have been trebling
you mayn't have been trebling
she mayn't have been trebling
we mayn't have been trebling
you mayn't have been trebling
they mayn't have been trebling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I treble?
may you treble?
may she treble?
may we treble?
may you treble?
may they treble? 	may I be trebling?
may you be trebling?
may she be trebling?
may we be trebling?
may you be trebling?
may they be trebling? 	may I have trebled?
may you have trebled?
may she have trebled?
may we have trebled?
may you have trebled?
may they have trebled? 	may I have been trebling?
may you have been trebling?
may she have been trebling?
may we have been trebling?
may you have been trebling?
may they have been trebling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I treble?
mayn't you treble?
mayn't she treble?
mayn't we treble?
mayn't you treble?
mayn't they treble? 	mayn't I be trebling?
mayn't you be trebling?
mayn't she be trebling?
mayn't we be trebling?
mayn't you be trebling?
mayn't they be trebling? 	mayn't I have trebled?
mayn't you have trebled?
mayn't she have trebled?
mayn't we have trebled?
mayn't you have trebled?
mayn't they have trebled? 	mayn't I have been trebling?
mayn't you have been trebling?
mayn't she have been trebling?
mayn't we have been trebling?
mayn't you have been trebling?
mayn't they have been trebling?