English verb conjugation
COULD DEBRIEF

Regular verb: debrief - debriefed - debriefed

Affirmation

Simple form	V-ing form
I could debrief you could debrief he could debrief we could debrief you could debrief they could debrief	I could be debriefing you could be debriefing he could be debriefing we could be debriefing you could be debriefing they could be debriefing
Perfect	V-ing perfect
I could have debriefed you could have debriefed he could have debriefed we could have debriefed you could have debriefed they could have debriefed	I could have been debriefing you could have been debriefing he could have been debriefing we could have been debriefing you could have been debriefing they could have been debriefing

Negation

Simple form	V-ing form
I could not debrief you could not debrief he could not debrief we could not debrief you could not debrief they could not debrief	I could not be debriefing you could not be debriefing he could not be debriefing we could not be debriefing you could not be debriefing they could not be debriefing
Perfect	V-ing perfect
I could not have debriefed you could not have debriefed he could not have debriefed we could not have debriefed you could not have debriefed they could not have debriefed	I could not have been debriefing you could not have been debriefing he could not have been debriefing we could not have been debriefing you could not have been debriefing they could not have been debriefing

Interrogative form

Simple form	V-ing form
could I debrief? could you debrief? could he debrief? could we debrief? could you debrief? could they debrief?	could I be debriefing? could you be debriefing? could he be debriefing? could we be debriefing? could you be debriefing? could they be debriefing?
Perfect	V-ing perfect
could I have debriefed? could you have debriefed? could he have debriefed? could we have debriefed? could you have debriefed? could they have debriefed?	could I have been debriefing? could you have been debriefing? could he have been debriefing? could we have been debriefing? could you have been debriefing? could they have been debriefing?

Interro-negative form

Simple form	V-ing form
could I not debrief? could you not debrief? could he not debrief? could we not debrief? could you not debrief? could they not debrief?	could I not be debriefing? could you not be debriefing? could he not be debriefing? could we not be debriefing? could you not be debriefing? could they not be debriefing?
Perfect	V-ing perfect
could I not have debriefed? could you not have debriefed? could he not have debriefed? could we not have debriefed? could you not have debriefed? could they not have debriefed?	could I not have been debriefing? could you not have been debriefing? could he not have been debriefing? could we not have been debriefing? could you not have been debriefing? could they not have been debriefing?