I can brief you can brief he can brief we can brief you can brief they can brief
Forma con V-ing
I can be briefing you can be briefing he can be briefing we can be briefing you can be briefing they can be briefing
Perfecto
I can have briefed you can have briefed he can have briefed we can have briefed you can have briefed they can have briefed
Perfecto con V-ing
I can have been briefing you can have been briefing he can have been briefing we can have been briefing you can have been briefing they can have been briefing
Negación
Forma simple
I cannot brief you cannot brief he cannot brief we cannot brief you cannot brief they cannot brief
Forma con V-ing
I cannot be briefing you cannot be briefing he cannot be briefing we cannot be briefing you cannot be briefing they cannot be briefing
Perfecto
I cannot have briefed you cannot have briefed he cannot have briefed we cannot have briefed you cannot have briefed they cannot have briefed
Perfecto con V-ing
I cannot have been briefing you cannot have been briefing he cannot have been briefing we cannot have been briefing you cannot have been briefing they cannot have been briefing
Forma interrogativa
Forma simple
can I brief? can you brief? can he brief? can we brief? can you brief? can they brief?
Forma con V-ing
can I be briefing? can you be briefing? can he be briefing? can we be briefing? can you be briefing? can they be briefing?
Perfecto
can I have briefed? can you have briefed? can he have briefed? can we have briefed? can you have briefed? can they have briefed?
Perfecto con V-ing
can I have been briefing? can you have been briefing? can he have been briefing? can we have been briefing? can you have been briefing? can they have been briefing?
Forma interro-negativa
Forma simple
can I not brief? can you not brief? can he not brief? can we not brief? can you not brief? can they not brief?
Forma con V-ing
can I not be briefing? can you not be briefing? can he not be briefing? can we not be briefing? can you not be briefing? can they not be briefing?
Perfecto
can I not have briefed? can you not have briefed? can he not have briefed? can we not have briefed? can you not have briefed? can they not have briefed?
Perfecto con V-ing
can I not have been briefing? can you not have been briefing? can he not have been briefing? can we not have been briefing? can you not have been briefing? can they not have been briefing?