ought to treble
Regular verb: treble - trebled- trebled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to treble
you ought to treble
he ought to treble
we ought to treble
you ought to treble
they ought to treble 	I ought to be trebling
you ought to be trebling
he ought to be trebling
we ought to be trebling
you ought to be trebling
they ought to be trebling	I ought to have trebled
you ought to have trebled
he ought to have trebled
we ought to have trebled
you ought to have trebled
they ought to have trebled	I ought to have been trebling
you ought to have been trebling
he ought to have been trebling
we ought to have been trebling
you ought to have been trebling
they ought to have been trebling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to treble
you ought not to treble
he ought not to treble
we ought not to treble
you ought not to treble
they ought not to treble 	I ought not to trebling
you ought not to trebling
he ought not to trebling
we ought not to trebling
you ought not to trebling
they ought not to trebling	I ought not to have trebled
you ought not to have trebled
he ought not to have trebled
we ought not to have trebled
you ought not to have trebled
they ought not to have trebled	I ought not to have been trebling
you ought not to have been trebling
he ought not to have been trebling
we ought not to have been trebling
you ought not to have been trebling
they ought not to have been trebling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I treble?
ought to you treble?
ought to he treble?
ought to we treble?
ought to you treble?
ought to they treble? 	ought to I be trebling?
ought to you be trebling?
ought to he be trebling?
ought to we be trebling?
ought to you be trebling?
ought to they be trebling? 	ought to I have trebled?
ought to you have trebled?
ought to he have trebled?
ought to we have trebled?
ought to you have trebled?
ought to they have trebled? 	ought to I have been trebling?
ought to you have been trebling?
ought to he have been trebling?
ought to we have been trebling?
ought to you have been trebling?
ought to they have been trebling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to treble?
ought you not to treble?
ought he not to treble?
ought we not to treble?
ought you not to treble?
ought they not to treble? 	ought I not to be trebling?
ought you not to be trebling?
ought he not to be trebling?
ought we not to be trebling?
ought you not to be trebling?
ought they not to be trebling? 	ought I not to have trebled?
ought you not to have trebled?
ought he not to have trebled?
ought we not to have trebled?
ought you not to have trebled?
ought they not to have trebled? 	ought I not to have been trebling?
ought you not to have been trebling?
ought he not to have been trebling?
ought we not to have been trebling?
ought you not to have been trebling?
ought they not to have been trebling?