English verb conjugation
OUGHT TO UNDERSTAND

Irregular verb: understand - understood - understood

Affirmation

Simple form	V-ing form
I ought to understand you ought to understand he ought to understand we ought to understand you ought to understand they ought to understand	I ought to be understanding you ought to be understanding he ought to be understanding we ought to be understanding you ought to be understanding they ought to be understanding
Perfect	V-ing perfect
I ought to have understood you ought to have understood he ought to have understood we ought to have understood you ought to have understood they ought to have understood	I ought to have been understanding you ought to have been understanding he ought to have been understanding we ought to have been understanding you ought to have been understanding they ought to have been understanding

Negation

Simple form	V-ing form
I ought not to understand you ought not to understand he ought not to understand we ought not to understand you ought not to understand they ought not to understand	I ought not to understanding you ought not to understanding he ought not to understanding we ought not to understanding you ought not to understanding they ought not to understanding
Perfect	V-ing perfect
I ought not to have understood you ought not to have understood he ought not to have understood we ought not to have understood you ought not to have understood they ought not to have understood	I ought not to have been understanding you ought not to have been understanding he ought not to have been understanding we ought not to have been understanding you ought not to have been understanding they ought not to have been understanding

Interrogative form

Simple form	V-ing form
ought to I understand? ought to you understand? ought to he understand? ought to we understand? ought to you understand? ought to they understand?	ought to I be understanding? ought to you be understanding? ought to he be understanding? ought to we be understanding? ought to you be understanding? ought to they be understanding?
Perfect	V-ing perfect
ought to I have understood? ought to you have understood? ought to he have understood? ought to we have understood? ought to you have understood? ought to they have understood?	ought to I have been understanding? ought to you have been understanding? ought to he have been understanding? ought to we have been understanding? ought to you have been understanding? ought to they have been understanding?

Interro-negative form

Simple form	V-ing form
ought I not to understand? ought you not to understand? ought he not to understand? ought we not to understand? ought you not to understand? ought they not to understand?	ought I not to be understanding? ought you not to be understanding? ought he not to be understanding? ought we not to be understanding? ought you not to be understanding? ought they not to be understanding?
Perfect	V-ing perfect
ought I not to have understood? ought you not to have understood? ought he not to have understood? ought we not to have understood? ought you not to have understood? ought they not to have understood?	ought I not to have been understanding? ought you not to have been understanding? ought he not to have been understanding? ought we not to have been understanding? ought you not to have been understanding? ought they not to have been understanding?