English verb conjugation
COULD AGREE

Regular verb: agree - agreed - agreed

Affirmation

Simple form	V-ing form
I could agree you could agree he could agree we could agree you could agree they could agree	I could be agreeing you could be agreeing he could be agreeing we could be agreeing you could be agreeing they could be agreeing
Perfect	V-ing perfect
I could have agreed you could have agreed he could have agreed we could have agreed you could have agreed they could have agreed	I could have been agreeing you could have been agreeing he could have been agreeing we could have been agreeing you could have been agreeing they could have been agreeing

Negation

Simple form	V-ing form
I could not agree you could not agree he could not agree we could not agree you could not agree they could not agree	I could not be agreeing you could not be agreeing he could not be agreeing we could not be agreeing you could not be agreeing they could not be agreeing
Perfect	V-ing perfect
I could not have agreed you could not have agreed he could not have agreed we could not have agreed you could not have agreed they could not have agreed	I could not have been agreeing you could not have been agreeing he could not have been agreeing we could not have been agreeing you could not have been agreeing they could not have been agreeing

Interrogative form

Simple form	V-ing form
could I agree? could you agree? could he agree? could we agree? could you agree? could they agree?	could I be agreeing? could you be agreeing? could he be agreeing? could we be agreeing? could you be agreeing? could they be agreeing?
Perfect	V-ing perfect
could I have agreed? could you have agreed? could he have agreed? could we have agreed? could you have agreed? could they have agreed?	could I have been agreeing? could you have been agreeing? could he have been agreeing? could we have been agreeing? could you have been agreeing? could they have been agreeing?

Interro-negative form

Simple form	V-ing form
could I not agree? could you not agree? could he not agree? could we not agree? could you not agree? could they not agree?	could I not be agreeing? could you not be agreeing? could he not be agreeing? could we not be agreeing? could you not be agreeing? could they not be agreeing?
Perfect	V-ing perfect
could I not have agreed? could you not have agreed? could he not have agreed? could we not have agreed? could you not have agreed? could they not have agreed?	could I not have been agreeing? could you not have been agreeing? could he not have been agreeing? could we not have been agreeing? could you not have been agreeing? could they not have been agreeing?