English verb conjugation
COULD CONCEDE

Regular verb: concede - conceded - conceded

Affirmation

Simple form	V-ing form
I could concede you could concede he could concede we could concede you could concede they could concede	I could be conceding you could be conceding he could be conceding we could be conceding you could be conceding they could be conceding
Perfect	V-ing perfect
I could have conceded you could have conceded he could have conceded we could have conceded you could have conceded they could have conceded	I could have been conceding you could have been conceding he could have been conceding we could have been conceding you could have been conceding they could have been conceding

Negation

Simple form	V-ing form
I could not concede you could not concede he could not concede we could not concede you could not concede they could not concede	I could not be conceding you could not be conceding he could not be conceding we could not be conceding you could not be conceding they could not be conceding
Perfect	V-ing perfect
I could not have conceded you could not have conceded he could not have conceded we could not have conceded you could not have conceded they could not have conceded	I could not have been conceding you could not have been conceding he could not have been conceding we could not have been conceding you could not have been conceding they could not have been conceding

Interrogative form

Simple form	V-ing form
could I concede? could you concede? could he concede? could we concede? could you concede? could they concede?	could I be conceding? could you be conceding? could he be conceding? could we be conceding? could you be conceding? could they be conceding?
Perfect	V-ing perfect
could I have conceded? could you have conceded? could he have conceded? could we have conceded? could you have conceded? could they have conceded?	could I have been conceding? could you have been conceding? could he have been conceding? could we have been conceding? could you have been conceding? could they have been conceding?

Interro-negative form

Simple form	V-ing form
could I not concede? could you not concede? could he not concede? could we not concede? could you not concede? could they not concede?	could I not be conceding? could you not be conceding? could he not be conceding? could we not be conceding? could you not be conceding? could they not be conceding?
Perfect	V-ing perfect
could I not have conceded? could you not have conceded? could he not have conceded? could we not have conceded? could you not have conceded? could they not have conceded?	could I not have been conceding? could you not have been conceding? could he not have been conceding? could we not have been conceding? could you not have been conceding? could they not have been conceding?