I could blurb you could blurb he could blurb we could blurb you could blurb they could blurb
V-ing form
I could be blurbing you could be blurbing he could be blurbing we could be blurbing you could be blurbing they could be blurbing
Perfect
I could have blurbed you could have blurbed he could have blurbed we could have blurbed you could have blurbed they could have blurbed
V-ing perfect
I could have been blurbing you could have been blurbing he could have been blurbing we could have been blurbing you could have been blurbing they could have been blurbing
Negation
Simple form
I could not blurb you could not blurb he could not blurb we could not blurb you could not blurb they could not blurb
V-ing form
I could not be blurbing you could not be blurbing he could not be blurbing we could not be blurbing you could not be blurbing they could not be blurbing
Perfect
I could not have blurbed you could not have blurbed he could not have blurbed we could not have blurbed you could not have blurbed they could not have blurbed
V-ing perfect
I could not have been blurbing you could not have been blurbing he could not have been blurbing we could not have been blurbing you could not have been blurbing they could not have been blurbing
Interrogative form
Simple form
could I blurb? could you blurb? could he blurb? could we blurb? could you blurb? could they blurb?
V-ing form
could I be blurbing? could you be blurbing? could he be blurbing? could we be blurbing? could you be blurbing? could they be blurbing?
Perfect
could I have blurbed? could you have blurbed? could he have blurbed? could we have blurbed? could you have blurbed? could they have blurbed?
V-ing perfect
could I have been blurbing? could you have been blurbing? could he have been blurbing? could we have been blurbing? could you have been blurbing? could they have been blurbing?
Interro-negative form
Simple form
could I not blurb? could you not blurb? could he not blurb? could we not blurb? could you not blurb? could they not blurb?
V-ing form
could I not be blurbing? could you not be blurbing? could he not be blurbing? could we not be blurbing? could you not be blurbing? could they not be blurbing?
Perfect
could I not have blurbed? could you not have blurbed? could he not have blurbed? could we not have blurbed? could you not have blurbed? could they not have blurbed?
V-ing perfect
could I not have been blurbing? could you not have been blurbing? could he not have been blurbing? could we not have been blurbing? could you not have been blurbing? could they not have been blurbing?