Regular verb: brief - briefed - briefed
Simple form | V-ing form |
I could brief you could brief he could brief we could brief you could brief they could brief | I could be briefing you could be briefing he could be briefing we could be briefing you could be briefing they could be briefing |
Perfect | V-ing perfect |
I could have briefed you could have briefed he could have briefed we could have briefed you could have briefed they could have briefed | I could have been briefing you could have been briefing he could have been briefing we could have been briefing you could have been briefing they could have been briefing |
Simple form | V-ing form |
I couldn't brief you couldn't brief he couldn't brief we couldn't brief you couldn't brief they couldn't brief | I couldn't be briefing you couldn't be briefing he couldn't be briefing we couldn't be briefing you couldn't be briefing they couldn't be briefing |
Perfect | V-ing perfect |
I couldn't have briefed you couldn't have briefed he couldn't have briefed we couldn't have briefed you couldn't have briefed they couldn't have briefed | I couldn't have been briefing you couldn't have been briefing he couldn't have been briefing we couldn't have been briefing you couldn't have been briefing they couldn't have been briefing |
Simple form | V-ing form |
could I brief? could you brief? could he brief? could we brief? could you brief? could they brief? | could I be briefing? could you be briefing? could he be briefing? could we be briefing? could you be briefing? could they be briefing? |
Perfect | V-ing perfect |
could I have briefed? could you have briefed? could he have briefed? could we have briefed? could you have briefed? could they have briefed? | could I have been briefing? could you have been briefing? could he have been briefing? could we have been briefing? could you have been briefing? could they have been briefing? |
Simple form | V-ing form |
couldn't I brief? couldn't you brief? couldn't he brief? couldn't we brief? couldn't you brief? couldn't they brief? | couldn't I be briefing? couldn't you be briefing? couldn't he be briefing? couldn't we be briefing? couldn't you be briefing? couldn't they be briefing? |
Perfect | V-ing perfect |
couldn't I have briefed? couldn't you have briefed? couldn't he have briefed? couldn't we have briefed? couldn't you have briefed? couldn't they have briefed? | couldn't I have been briefing? couldn't you have been briefing? couldn't he have been briefing? couldn't we have been briefing? couldn't you have been briefing? couldn't they have been briefing? |