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 couldn't debrief you couldn't debrief he couldn't debrief we couldn't debrief you couldn't debrief they couldn't debrief	I couldn't be debriefing you couldn't be debriefing he couldn't be debriefing we couldn't be debriefing you couldn't be debriefing they couldn't be debriefing
Perfect	V-ing perfect
I couldn't have debriefed you couldn't have debriefed he couldn't have debriefed we couldn't have debriefed you couldn't have debriefed they couldn't have debriefed	I couldn't have been debriefing you couldn't have been debriefing he couldn't have been debriefing we couldn't have been debriefing you couldn't have been debriefing they couldn't 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
couldn't I debrief? couldn't you debrief? couldn't he debrief? couldn't we debrief? couldn't you debrief? couldn't they debrief?	couldn't I be debriefing? couldn't you be debriefing? couldn't he be debriefing? couldn't we be debriefing? couldn't you be debriefing? couldn't they be debriefing?
Perfect	V-ing perfect
couldn't I have debriefed? couldn't you have debriefed? couldn't he have debriefed? couldn't we have debriefed? couldn't you have debriefed? couldn't they have debriefed?	couldn't I have been debriefing? couldn't you have been debriefing? couldn't he have been debriefing? couldn't we have been debriefing? couldn't you have been debriefing? couldn't they have been debriefing?