ought to witness
Regular verb: witness - witnessed- witnessed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to witness
you ought to witness
he ought to witness
we ought to witness
you ought to witness
they ought to witness 	I ought to be witnessing
you ought to be witnessing
he ought to be witnessing
we ought to be witnessing
you ought to be witnessing
they ought to be witnessing	I ought to have witnessed
you ought to have witnessed
he ought to have witnessed
we ought to have witnessed
you ought to have witnessed
they ought to have witnessed	I ought to have been witnessing
you ought to have been witnessing
he ought to have been witnessing
we ought to have been witnessing
you ought to have been witnessing
they ought to have been witnessing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to witness
you ought not to witness
he ought not to witness
we ought not to witness
you ought not to witness
they ought not to witness 	I ought not to witnessing
you ought not to witnessing
he ought not to witnessing
we ought not to witnessing
you ought not to witnessing
they ought not to witnessing	I ought not to have witnessed
you ought not to have witnessed
he ought not to have witnessed
we ought not to have witnessed
you ought not to have witnessed
they ought not to have witnessed	I ought not to have been witnessing
you ought not to have been witnessing
he ought not to have been witnessing
we ought not to have been witnessing
you ought not to have been witnessing
they ought not to have been witnessing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I witness?
ought to you witness?
ought to he witness?
ought to we witness?
ought to you witness?
ought to they witness? 	ought to I be witnessing?
ought to you be witnessing?
ought to he be witnessing?
ought to we be witnessing?
ought to you be witnessing?
ought to they be witnessing? 	ought to I have witnessed?
ought to you have witnessed?
ought to he have witnessed?
ought to we have witnessed?
ought to you have witnessed?
ought to they have witnessed? 	ought to I have been witnessing?
ought to you have been witnessing?
ought to he have been witnessing?
ought to we have been witnessing?
ought to you have been witnessing?
ought to they have been witnessing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to witness?
ought you not to witness?
ought he not to witness?
ought we not to witness?
ought you not to witness?
ought they not to witness? 	ought I not to be witnessing?
ought you not to be witnessing?
ought he not to be witnessing?
ought we not to be witnessing?
ought you not to be witnessing?
ought they not to be witnessing? 	ought I not to have witnessed?
ought you not to have witnessed?
ought he not to have witnessed?
ought we not to have witnessed?
ought you not to have witnessed?
ought they not to have witnessed? 	ought I not to have been witnessing?
ought you not to have been witnessing?
ought he not to have been witnessing?
ought we not to have been witnessing?
ought you not to have been witnessing?
ought they not to have been witnessing?