I'd be underlining you'd be underlining she'd be underlining we'd be underlining you'd be underlining they'd be underlining
Perfect
I should've underlined you should've underlined she should've underlined we should've underlined you should've underlined they should've underlined
V-ing perfect
I should've been underlining you should've been underlining she should've been underlining we should've been underlining you should've been underlining they should've been underlining
Negation
Simple form
I shouldn't underline you shouldn't underline she shouldn't underline we shouldn't underline you shouldn't underline they shouldn't underline
V-ing form
I shouldn't be underlining you shouldn't be underlining she shouldn't be underlining we shouldn't be underlining you shouldn't be underlining they shouldn't be underlining
Perfect
I shouldn't have underlined you shouldn't have underlined she shouldn't have underlined we shouldn't have underlined you shouldn't have underlined they shouldn't have underlined
V-ing perfect
I shouldn't have been underlining you shouldn't have been underlining she shouldn't have been underlining we shouldn't have been underlining you shouldn't have been underlining they shouldn't have been underlining
Interrogative form
Simple form
should I underline? should you underline? should she underline? should we underline? should you underline? should they underline?
V-ing form
should I be underlining? should you be underlining? should she be underlining? should we be underlining? should you be underlining? should they be underlining?
Perfect
should I have underlined? should you have underlined? should she have underlined? should we have underlined? should you have underlined? should they have underlined?
V-ing perfect
should I have been underlining? should you have been underlining? should she have been underlining? should we have been underlining? should you have been underlining? should they have been underlining?
Interro-negative form
Simple form
shouldn't I underline? shouldn't you underline? shouldn't she underline? shouldn't we underline? shouldn't you underline? shouldn't they underline?
V-ing form
shouldn't I be underlining? shouldn't you be underlining? shouldn't she be underlining? shouldn't we be underlining? shouldn't you be underlining? shouldn't they be underlining?
Perfect
shouldn't I have underlined? shouldn't you have underlined? shouldn't she have underlined? shouldn't we have underlined? shouldn't you have underlined? shouldn't they have underlined?
V-ing perfect
shouldn't I have been underlining? shouldn't you have been underlining? shouldn't she have been underlining? shouldn't we have been underlining? shouldn't you have been underlining? shouldn't they have been underlining?