ought to demonstrate
Regular verb: demonstrate - demonstrated- demonstrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to demonstrate
you ought to demonstrate
she ought to demonstrate
we ought to demonstrate
you ought to demonstrate
they ought to demonstrate 	I ought to be demonstrating
you ought to be demonstrating
she ought to be demonstrating
we ought to be demonstrating
you ought to be demonstrating
they ought to be demonstrating	I ought to have demonstrated
you ought to have demonstrated
she ought to have demonstrated
we ought to have demonstrated
you ought to have demonstrated
they ought to have demonstrated	I ought to have been demonstrating
you ought to have been demonstrating
she ought to have been demonstrating
we ought to have been demonstrating
you ought to have been demonstrating
they ought to have been demonstrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to demonstrate
you ought not to demonstrate
she ought not to demonstrate
we ought not to demonstrate
you ought not to demonstrate
they ought not to demonstrate 	I ought not to demonstrating
you ought not to demonstrating
she ought not to demonstrating
we ought not to demonstrating
you ought not to demonstrating
they ought not to demonstrating	I ought not to have demonstrated
you ought not to have demonstrated
she ought not to have demonstrated
we ought not to have demonstrated
you ought not to have demonstrated
they ought not to have demonstrated	I ought not to have been demonstrating
you ought not to have been demonstrating
she ought not to have been demonstrating
we ought not to have been demonstrating
you ought not to have been demonstrating
they ought not to have been demonstrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I demonstrate?
ought to you demonstrate?
ought to she demonstrate?
ought to we demonstrate?
ought to you demonstrate?
ought to they demonstrate? 	ought to I be demonstrating?
ought to you be demonstrating?
ought to she be demonstrating?
ought to we be demonstrating?
ought to you be demonstrating?
ought to they be demonstrating? 	ought to I have demonstrated?
ought to you have demonstrated?
ought to she have demonstrated?
ought to we have demonstrated?
ought to you have demonstrated?
ought to they have demonstrated? 	ought to I have been demonstrating?
ought to you have been demonstrating?
ought to she have been demonstrating?
ought to we have been demonstrating?
ought to you have been demonstrating?
ought to they have been demonstrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to demonstrate?
ought you not to demonstrate?
ought she not to demonstrate?
ought we not to demonstrate?
ought you not to demonstrate?
ought they not to demonstrate? 	ought I not to be demonstrating?
ought you not to be demonstrating?
ought she not to be demonstrating?
ought we not to be demonstrating?
ought you not to be demonstrating?
ought they not to be demonstrating? 	ought I not to have demonstrated?
ought you not to have demonstrated?
ought she not to have demonstrated?
ought we not to have demonstrated?
ought you not to have demonstrated?
ought they not to have demonstrated? 	ought I not to have been demonstrating?
ought you not to have been demonstrating?
ought she not to have been demonstrating?
ought we not to have been demonstrating?
ought you not to have been demonstrating?
ought they not to have been demonstrating?