I should straighten you should straighten she should straighten we should straighten you should straighten they should straighten
V-ing form
I should be straightening you should be straightening she should be straightening we should be straightening you should be straightening they should be straightening
Perfect
I should have straightened you should have straightened she should have straightened we should have straightened you should have straightened they should have straightened
V-ing perfect
I should have been straightening you should have been straightening she should have been straightening we should have been straightening you should have been straightening they should have been straightening
Negation
Simple form
I should not straighten you should not straighten she should not straighten we should not straighten you should not straighten they should not straighten
V-ing form
I should not be straightening you should not be straightening she should not be straightening we should not be straightening you should not be straightening they should not be straightening
Perfect
I should not have straightened you should not have straightened she should not have straightened we should not have straightened you should not have straightened they should not have straightened
V-ing perfect
I should not have been straightening you should not have been straightening she should not have been straightening we should not have been straightening you should not have been straightening they should not have been straightening
Interrogative form
Simple form
should I straighten? should you straighten? should she straighten? should we straighten? should you straighten? should they straighten?
V-ing form
should I be straightening? should you be straightening? should she be straightening? should we be straightening? should you be straightening? should they be straightening?
Perfect
should I have straightened? should you have straightened? should she 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 she have been straightening? should we have been straightening? should you have been straightening? should they have been straightening?
Interro-negative form
Simple form
should I not straighten? should you not straighten? should she not straighten? should we not straighten? should you not straighten? should they not straighten?
V-ing form
should I not be straightening? should you not be straightening? should she not be straightening? should we not be straightening? should you not be straightening? should they not be straightening?
Perfect
should I not have straightened? should you not have straightened? should she not have straightened? should we not have straightened? should you not have straightened? should they not have straightened?
V-ing perfect
should I not have been straightening? should you not have been straightening? should she not have been straightening? should we not have been straightening? should you not have been straightening? should they not have been straightening?