I'd be straightening you'd be straightening he'd be straightening we'd be straightening you'd be straightening they'd be straightening
Perfect
I should've straightened you should've straightened he should've straightened we should've straightened you should've straightened they should've straightened
V-ing perfect
I should've been straightening you should've been straightening he should've been straightening we should've been straightening you should've been straightening they should've been straightening
Negation
Simple form
I shouldn't straighten you shouldn't straighten he shouldn't straighten we shouldn't straighten you shouldn't straighten they shouldn't straighten
V-ing form
I shouldn't be straightening you shouldn't be straightening he shouldn't be straightening we shouldn't be straightening you shouldn't be straightening they shouldn't be straightening
Perfect
I shouldn't have straightened you shouldn't have straightened he shouldn't have straightened we shouldn't have straightened you shouldn't have straightened they shouldn't have straightened
V-ing perfect
I shouldn't have been straightening you shouldn't have been straightening he shouldn't have been straightening we shouldn't have been straightening you shouldn't have been straightening they shouldn't have been straightening
Interrogative form
Simple form
should I straighten? should you straighten? should he straighten? should we straighten? should you straighten? should they straighten?
V-ing form
should I be straightening? should you be straightening? should he be straightening? should we be straightening? should you be straightening? should they be straightening?
Perfect
should I have straightened? should you have straightened? should he have straightened? should we have straightened? should you have straightened? should they have straightened?
V-ing perfect
should I have been straightening? should you have been straightening? should he have been straightening? should we have been straightening? should you have been straightening? should they have been straightening?
Interro-negative form
Simple form
shouldn't I straighten? shouldn't you straighten? shouldn't he straighten? shouldn't we straighten? shouldn't you straighten? shouldn't they straighten?
V-ing form
shouldn't I be straightening? shouldn't you be straightening? shouldn't he be straightening? shouldn't we be straightening? shouldn't you be straightening? shouldn't they be straightening?
Perfect
shouldn't I have straightened? shouldn't you have straightened? shouldn't he have straightened? shouldn't we have straightened? shouldn't you have straightened? shouldn't they have straightened?
V-ing perfect
shouldn't I have been straightening? shouldn't you have been straightening? shouldn't he have been straightening? shouldn't we have been straightening? shouldn't you have been straightening? shouldn't they have been straightening?