ought to invalidate
Regular verb: invalidate - invalidated- invalidated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to invalidate
you ought to invalidate
she ought to invalidate
we ought to invalidate
you ought to invalidate
they ought to invalidate 	I ought to be invalidating
you ought to be invalidating
she ought to be invalidating
we ought to be invalidating
you ought to be invalidating
they ought to be invalidating	I ought to have invalidated
you ought to have invalidated
she ought to have invalidated
we ought to have invalidated
you ought to have invalidated
they ought to have invalidated	I ought to have been invalidating
you ought to have been invalidating
she ought to have been invalidating
we ought to have been invalidating
you ought to have been invalidating
they ought to have been invalidating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to invalidate
you ought not to invalidate
she ought not to invalidate
we ought not to invalidate
you ought not to invalidate
they ought not to invalidate 	I ought not to invalidating
you ought not to invalidating
she ought not to invalidating
we ought not to invalidating
you ought not to invalidating
they ought not to invalidating	I ought not to have invalidated
you ought not to have invalidated
she ought not to have invalidated
we ought not to have invalidated
you ought not to have invalidated
they ought not to have invalidated	I ought not to have been invalidating
you ought not to have been invalidating
she ought not to have been invalidating
we ought not to have been invalidating
you ought not to have been invalidating
they ought not to have been invalidating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I invalidate?
ought to you invalidate?
ought to she invalidate?
ought to we invalidate?
ought to you invalidate?
ought to they invalidate? 	ought to I be invalidating?
ought to you be invalidating?
ought to she be invalidating?
ought to we be invalidating?
ought to you be invalidating?
ought to they be invalidating? 	ought to I have invalidated?
ought to you have invalidated?
ought to she have invalidated?
ought to we have invalidated?
ought to you have invalidated?
ought to they have invalidated? 	ought to I have been invalidating?
ought to you have been invalidating?
ought to she have been invalidating?
ought to we have been invalidating?
ought to you have been invalidating?
ought to they have been invalidating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to invalidate?
ought you not to invalidate?
ought she not to invalidate?
ought we not to invalidate?
ought you not to invalidate?
ought they not to invalidate? 	ought I not to be invalidating?
ought you not to be invalidating?
ought she not to be invalidating?
ought we not to be invalidating?
ought you not to be invalidating?
ought they not to be invalidating? 	ought I not to have invalidated?
ought you not to have invalidated?
ought she not to have invalidated?
ought we not to have invalidated?
ought you not to have invalidated?
ought they not to have invalidated? 	ought I not to have been invalidating?
ought you not to have been invalidating?
ought she not to have been invalidating?
ought we not to have been invalidating?
ought you not to have been invalidating?
ought they not to have been invalidating?