I'd be rubbing you'd be rubbing he'd be rubbing we'd be rubbing you'd be rubbing they'd be rubbing
Perfect
I should've rubbed you should've rubbed he should've rubbed we should've rubbed you should've rubbed they should've rubbed
V-ing perfect
I should've been rubbing you should've been rubbing he should've been rubbing we should've been rubbing you should've been rubbing they should've been rubbing
Negation
Simple form
I shouldn't rub you shouldn't rub he shouldn't rub we shouldn't rub you shouldn't rub they shouldn't rub
V-ing form
I shouldn't be rubbing you shouldn't be rubbing he shouldn't be rubbing we shouldn't be rubbing you shouldn't be rubbing they shouldn't be rubbing
Perfect
I shouldn't have rubbed you shouldn't have rubbed he shouldn't have rubbed we shouldn't have rubbed you shouldn't have rubbed they shouldn't have rubbed
V-ing perfect
I shouldn't have been rubbing you shouldn't have been rubbing he shouldn't have been rubbing we shouldn't have been rubbing you shouldn't have been rubbing they shouldn't have been rubbing
Interrogative form
Simple form
should I rub? should you rub? should he rub? should we rub? should you rub? should they rub?
V-ing form
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
should I have rubbed? should you have rubbed? should he have rubbed? should we have rubbed? should you have rubbed? should they have rubbed?
V-ing perfect
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
shouldn't I rub? shouldn't you rub? shouldn't he rub? shouldn't we rub? shouldn't you rub? shouldn't they rub?
V-ing form
shouldn't I be rubbing? shouldn't you be rubbing? shouldn't he be rubbing? shouldn't we be rubbing? shouldn't you be rubbing? shouldn't they be rubbing?
Perfect
shouldn't I have rubbed? shouldn't you have rubbed? shouldn't he have rubbed? shouldn't we have rubbed? shouldn't you have rubbed? shouldn't they have rubbed?
V-ing perfect
shouldn't I have been rubbing? shouldn't you have been rubbing? shouldn't he have been rubbing? shouldn't we have been rubbing? shouldn't you have been rubbing? shouldn't they have been rubbing?