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