ought to heighten
Regular verb: heighten - heightened- heightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to heighten
you ought to heighten
he ought to heighten
we ought to heighten
you ought to heighten
they ought to heighten 	I ought to be heightening
you ought to be heightening
he ought to be heightening
we ought to be heightening
you ought to be heightening
they ought to be heightening	I ought to have heightened
you ought to have heightened
he ought to have heightened
we ought to have heightened
you ought to have heightened
they ought to have heightened	I ought to have been heightening
you ought to have been heightening
he ought to have been heightening
we ought to have been heightening
you ought to have been heightening
they ought to have been heightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to heighten
you ought not to heighten
he ought not to heighten
we ought not to heighten
you ought not to heighten
they ought not to heighten 	I ought not to heightening
you ought not to heightening
he ought not to heightening
we ought not to heightening
you ought not to heightening
they ought not to heightening	I ought not to have heightened
you ought not to have heightened
he ought not to have heightened
we ought not to have heightened
you ought not to have heightened
they ought not to have heightened	I ought not to have been heightening
you ought not to have been heightening
he ought not to have been heightening
we ought not to have been heightening
you ought not to have been heightening
they ought not to have been heightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I heighten?
ought to you heighten?
ought to he heighten?
ought to we heighten?
ought to you heighten?
ought to they heighten? 	ought to I be heightening?
ought to you be heightening?
ought to he be heightening?
ought to we be heightening?
ought to you be heightening?
ought to they be heightening? 	ought to I have heightened?
ought to you have heightened?
ought to he have heightened?
ought to we have heightened?
ought to you have heightened?
ought to they have heightened? 	ought to I have been heightening?
ought to you have been heightening?
ought to he have been heightening?
ought to we have been heightening?
ought to you have been heightening?
ought to they have been heightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to heighten?
ought you not to heighten?
ought he not to heighten?
ought we not to heighten?
ought you not to heighten?
ought they not to heighten? 	ought I not to be heightening?
ought you not to be heightening?
ought he not to be heightening?
ought we not to be heightening?
ought you not to be heightening?
ought they not to be heightening? 	ought I not to have heightened?
ought you not to have heightened?
ought he not to have heightened?
ought we not to have heightened?
ought you not to have heightened?
ought they not to have heightened? 	ought I not to have been heightening?
ought you not to have been heightening?
ought he not to have been heightening?
ought we not to have been heightening?
ought you not to have been heightening?
ought they not to have been heightening?