I should brief you should brief he should brief we should brief you should brief they should brief
V-ing form
I should be briefing you should be briefing he should be briefing we should be briefing you should be briefing they should be briefing
Perfect
I should have briefed you should have briefed he should have briefed we should have briefed you should have briefed they should have briefed
V-ing perfect
I should have been briefing you should have been briefing he should have been briefing we should have been briefing you should have been briefing they should have been briefing
Negation
Simple form
I should not brief you should not brief he should not brief we should not brief you should not brief they should not brief
V-ing form
I should not be briefing you should not be briefing he should not be briefing we should not be briefing you should not be briefing they should not be briefing
Perfect
I should not have briefed you should not have briefed he should not have briefed we should not have briefed you should not have briefed they should not have briefed
V-ing perfect
I should not have been briefing you should not have been briefing he should not have been briefing we should not have been briefing you should not have been briefing they should not have been briefing
Interrogative form
Simple form
should I brief? should you brief? should he brief? should we brief? should you brief? should they brief?
V-ing form
should I be briefing? should you be briefing? should he be briefing? should we be briefing? should you be briefing? should they be briefing?
Perfect
should I have briefed? should you have briefed? should he 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 he have been briefing? should we have been briefing? should you have been briefing? should they have been briefing?
Interro-negative form
Simple form
should I not brief? should you not brief? should he not brief? should we not brief? should you not brief? should they not brief?
V-ing form
should I not be briefing? should you not be briefing? should he not be briefing? should we not be briefing? should you not be briefing? should they not be briefing?
Perfect
should I not have briefed? should you not have briefed? should he not have briefed? should we not have briefed? should you not have briefed? should they not have briefed?
V-ing perfect
should I not have been briefing? should you not have been briefing? should he not have been briefing? should we not have been briefing? should you not have been briefing? should they not have been briefing?