ought to smoothen
Regular verb: smoothen - smoothened- smoothened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to smoothen
you ought to smoothen
he ought to smoothen
we ought to smoothen
you ought to smoothen
they ought to smoothen 	I ought to be smoothening
you ought to be smoothening
he ought to be smoothening
we ought to be smoothening
you ought to be smoothening
they ought to be smoothening	I ought to have smoothened
you ought to have smoothened
he ought to have smoothened
we ought to have smoothened
you ought to have smoothened
they ought to have smoothened	I ought to have been smoothening
you ought to have been smoothening
he ought to have been smoothening
we ought to have been smoothening
you ought to have been smoothening
they ought to have been smoothening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to smoothen
you ought not to smoothen
he ought not to smoothen
we ought not to smoothen
you ought not to smoothen
they ought not to smoothen 	I ought not to smoothening
you ought not to smoothening
he ought not to smoothening
we ought not to smoothening
you ought not to smoothening
they ought not to smoothening	I ought not to have smoothened
you ought not to have smoothened
he ought not to have smoothened
we ought not to have smoothened
you ought not to have smoothened
they ought not to have smoothened	I ought not to have been smoothening
you ought not to have been smoothening
he ought not to have been smoothening
we ought not to have been smoothening
you ought not to have been smoothening
they ought not to have been smoothening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I smoothen?
ought to you smoothen?
ought to he smoothen?
ought to we smoothen?
ought to you smoothen?
ought to they smoothen? 	ought to I be smoothening?
ought to you be smoothening?
ought to he be smoothening?
ought to we be smoothening?
ought to you be smoothening?
ought to they be smoothening? 	ought to I have smoothened?
ought to you have smoothened?
ought to he have smoothened?
ought to we have smoothened?
ought to you have smoothened?
ought to they have smoothened? 	ought to I have been smoothening?
ought to you have been smoothening?
ought to he have been smoothening?
ought to we have been smoothening?
ought to you have been smoothening?
ought to they have been smoothening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to smoothen?
ought you not to smoothen?
ought he not to smoothen?
ought we not to smoothen?
ought you not to smoothen?
ought they not to smoothen? 	ought I not to be smoothening?
ought you not to be smoothening?
ought he not to be smoothening?
ought we not to be smoothening?
ought you not to be smoothening?
ought they not to be smoothening? 	ought I not to have smoothened?
ought you not to have smoothened?
ought he not to have smoothened?
ought we not to have smoothened?
ought you not to have smoothened?
ought they not to have smoothened? 	ought I not to have been smoothening?
ought you not to have been smoothening?
ought he not to have been smoothening?
ought we not to have been smoothening?
ought you not to have been smoothening?
ought they not to have been smoothening?