English verb conjugation
SHOULD PLUMB

Regular verb: plumb - plumbed - plumbed

Affirmation

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

Negation

Simple form	V-ing form
I should not plumb you should not plumb he should not plumb we should not plumb you should not plumb they should not plumb	I should not be plumbing you should not be plumbing he should not be plumbing we should not be plumbing you should not be plumbing they should not be plumbing
Perfect	V-ing perfect
I should not have plumbed you should not have plumbed he should not have plumbed we should not have plumbed you should not have plumbed they should not have plumbed	I should not have been plumbing you should not have been plumbing he should not have been plumbing we should not have been plumbing you should not have been plumbing they should not have been plumbing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
should I not plumb? should you not plumb? should he not plumb? should we not plumb? should you not plumb? should they not plumb?	should I not be plumbing? should you not be plumbing? should he not be plumbing? should we not be plumbing? should you not be plumbing? should they not be plumbing?
Perfect	V-ing perfect
should I not have plumbed? should you not have plumbed? should he not have plumbed? should we not have plumbed? should you not have plumbed? should they not have plumbed?	should I not have been plumbing? should you not have been plumbing? should he not have been plumbing? should we not have been plumbing? should you not have been plumbing? should they not have been plumbing?