English verb conjugation
SHOULD RUB

Regular verb: rub - rubbed - rubbed

Affirmation

Simple form	V-ing form
I should rub you should rub he should rub we should rub you should rub they should rub	I should be rubbing you should be rubbing he should be rubbing we should be rubbing you should be rubbing they should be rubbing
Perfect	V-ing perfect
I should have rubbed you should have rubbed he should have rubbed we should have rubbed you should have rubbed they should have rubbed	I should have been rubbing you should have been rubbing he should have been rubbing we should have been rubbing you should have been rubbing they should have been rubbing

Negation

Simple form	V-ing form
I should not rub you should not rub he should not rub we should not rub you should not rub they should not rub	I should not be rubbing you should not be rubbing he should not be rubbing we should not be rubbing you should not be rubbing they should not be rubbing
Perfect	V-ing perfect
I should not have rubbed you should not have rubbed he should not have rubbed we should not have rubbed you should not have rubbed they should not have rubbed	I should not have been rubbing you should not have been rubbing he should not have been rubbing we should not have been rubbing you should not have been rubbing they should not have been rubbing

Interrogative form

Simple form	V-ing form
should I rub? should you rub? should he rub? should we rub? should you rub? should they rub?	should I be rubbing? should you be rubbing? should he be rubbing? should we be rubbing? should you be rubbing? should they be rubbing?
Perfect	V-ing perfect
should I have rubbed? should you have rubbed? should he have rubbed? should we have rubbed? should you have rubbed? should they have rubbed?	should I have been rubbing? should you have been rubbing? should he have been rubbing? should we have been rubbing? should you have been rubbing? should they have been rubbing?

Interro-negative form

Simple form	V-ing form
should I not rub? should you not rub? should he not rub? should we not rub? should you not rub? should they not rub?	should I not be rubbing? should you not be rubbing? should he not be rubbing? should we not be rubbing? should you not be rubbing? should they not be rubbing?
Perfect	V-ing perfect
should I not have rubbed? should you not have rubbed? should he not have rubbed? should we not have rubbed? should you not have rubbed? should they not have rubbed?	should I not have been rubbing? should you not have been rubbing? should he not have been rubbing? should we not have been rubbing? should you not have been rubbing? should they not have been rubbing?