ought to alter
Regular verb: alter - altered- altered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to alter
you ought to alter
she ought to alter
we ought to alter
you ought to alter
they ought to alter 	I ought to be altering
you ought to be altering
she ought to be altering
we ought to be altering
you ought to be altering
they ought to be altering	I ought to have altered
you ought to have altered
she ought to have altered
we ought to have altered
you ought to have altered
they ought to have altered	I ought to have been altering
you ought to have been altering
she ought to have been altering
we ought to have been altering
you ought to have been altering
they ought to have been altering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to alter
you ought not to alter
she ought not to alter
we ought not to alter
you ought not to alter
they ought not to alter 	I ought not to altering
you ought not to altering
she ought not to altering
we ought not to altering
you ought not to altering
they ought not to altering	I ought not to have altered
you ought not to have altered
she ought not to have altered
we ought not to have altered
you ought not to have altered
they ought not to have altered	I ought not to have been altering
you ought not to have been altering
she ought not to have been altering
we ought not to have been altering
you ought not to have been altering
they ought not to have been altering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I alter?
ought to you alter?
ought to she alter?
ought to we alter?
ought to you alter?
ought to they alter? 	ought to I be altering?
ought to you be altering?
ought to she be altering?
ought to we be altering?
ought to you be altering?
ought to they be altering? 	ought to I have altered?
ought to you have altered?
ought to she have altered?
ought to we have altered?
ought to you have altered?
ought to they have altered? 	ought to I have been altering?
ought to you have been altering?
ought to she have been altering?
ought to we have been altering?
ought to you have been altering?
ought to they have been altering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to alter?
ought you not to alter?
ought she not to alter?
ought we not to alter?
ought you not to alter?
ought they not to alter? 	ought I not to be altering?
ought you not to be altering?
ought she not to be altering?
ought we not to be altering?
ought you not to be altering?
ought they not to be altering? 	ought I not to have altered?
ought you not to have altered?
ought she not to have altered?
ought we not to have altered?
ought you not to have altered?
ought they not to have altered? 	ought I not to have been altering?
ought you not to have been altering?
ought she not to have been altering?
ought we not to have been altering?
ought you not to have been altering?
ought they not to have been altering?