ought to destain
Regular verb: destain - destained- destained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to destain
you ought to destain
she ought to destain
we ought to destain
you ought to destain
they ought to destain 	I ought to be destaining
you ought to be destaining
she ought to be destaining
we ought to be destaining
you ought to be destaining
they ought to be destaining	I ought to have destained
you ought to have destained
she ought to have destained
we ought to have destained
you ought to have destained
they ought to have destained	I ought to have been destaining
you ought to have been destaining
she ought to have been destaining
we ought to have been destaining
you ought to have been destaining
they ought to have been destaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to destain
you ought not to destain
she ought not to destain
we ought not to destain
you ought not to destain
they ought not to destain 	I ought not to destaining
you ought not to destaining
she ought not to destaining
we ought not to destaining
you ought not to destaining
they ought not to destaining	I ought not to have destained
you ought not to have destained
she ought not to have destained
we ought not to have destained
you ought not to have destained
they ought not to have destained	I ought not to have been destaining
you ought not to have been destaining
she ought not to have been destaining
we ought not to have been destaining
you ought not to have been destaining
they ought not to have been destaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I destain?
ought to you destain?
ought to she destain?
ought to we destain?
ought to you destain?
ought to they destain? 	ought to I be destaining?
ought to you be destaining?
ought to she be destaining?
ought to we be destaining?
ought to you be destaining?
ought to they be destaining? 	ought to I have destained?
ought to you have destained?
ought to she have destained?
ought to we have destained?
ought to you have destained?
ought to they have destained? 	ought to I have been destaining?
ought to you have been destaining?
ought to she have been destaining?
ought to we have been destaining?
ought to you have been destaining?
ought to they have been destaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to destain?
ought you not to destain?
ought she not to destain?
ought we not to destain?
ought you not to destain?
ought they not to destain? 	ought I not to be destaining?
ought you not to be destaining?
ought she not to be destaining?
ought we not to be destaining?
ought you not to be destaining?
ought they not to be destaining? 	ought I not to have destained?
ought you not to have destained?
ought she not to have destained?
ought we not to have destained?
ought you not to have destained?
ought they not to have destained? 	ought I not to have been destaining?
ought you not to have been destaining?
ought she not to have been destaining?
ought we not to have been destaining?
ought you not to have been destaining?
ought they not to have been destaining?