English verb conjugation
OUGHT TO PLUMB

Regular verb: plumb - plumbed - plumbed

Affirmation

Simple form	V-ing form
I ought to plumb you ought to plumb he ought to plumb we ought to plumb you ought to plumb they ought to plumb	I ought to be plumbing you ought to be plumbing he ought to be plumbing we ought to be plumbing you ought to be plumbing they ought to be plumbing
Perfect	V-ing perfect
I ought to have plumbed you ought to have plumbed he ought to have plumbed we ought to have plumbed you ought to have plumbed they ought to have plumbed	I ought to have been plumbing you ought to have been plumbing he ought to have been plumbing we ought to have been plumbing you ought to have been plumbing they ought to have been plumbing

Negation

Simple form	V-ing form
I oughtn't to plumb you oughtn't to plumb he oughtn't to plumb we oughtn't to plumb you oughtn't to plumb they oughtn't to plumb	I oughtn't to be plumbing you oughtn't to be plumbing he oughtn't to be plumbing we oughtn't to be plumbing you oughtn't to be plumbing they oughtn't to be plumbing
Perfect	V-ing perfect
I oughtn't to have plumbed you oughtn't to have plumbed he oughtn't to have plumbed we oughtn't to have plumbed you oughtn't to have plumbed they oughtn't to have plumbed	I oughtn't to have been plumbing you oughtn't to have been plumbing he oughtn't to have been plumbing we oughtn't to have been plumbing you oughtn't to have been plumbing they oughtn't to have been plumbing

Interrogative form

Simple form	V-ing form
ought to I plumb? ought to you plumb? ought to he plumb? ought to we plumb? ought to you plumb? ought to they plumb?	ought to I be plumbing? ought to you be plumbing? ought to he be plumbing? ought to we be plumbing? ought to you be plumbing? ought to they be plumbing?
Perfect	V-ing perfect
ought to I have plumbed? ought to you have plumbed? ought to he have plumbed? ought to we have plumbed? ought to you have plumbed? ought to they have plumbed?	ought to I have been plumbing? ought to you have been plumbing? ought to he have been plumbing? ought to we have been plumbing? ought to you have been plumbing? ought to they have been plumbing?

Interro-negative form

Simple form	V-ing form
oughtn't I to plumb? oughtn't you to plumb? oughtn't he to plumb? oughtn't we to plumb? oughtn't you to plumb? oughtn't they to plumb?	oughtn't I to be plumbing? oughtn't you to be plumbing? oughtn't he to be plumbing? oughtn't we to be plumbing? oughtn't you to be plumbing? oughtn't they to be plumbing?
Perfect	V-ing perfect
oughtn't I to have plumbed? oughtn't you to have plumbed? oughtn't he to have plumbed? oughtn't we to have plumbed? oughtn't you to have plumbed? oughtn't they to have plumbed?	oughtn't I to have been plumbing? oughtn't you to have been plumbing? oughtn't he to have been plumbing? oughtn't we to have been plumbing? oughtn't you to have been plumbing? oughtn't they to have been plumbing?