English verb conjugation
COULD DIB

Regular verb: dib - dibed - dibed

Affirmation

Simple form	V-ing form
I could dib you could dib she could dib we could dib you could dib they could dib	I could be dibing you could be dibing she could be dibing we could be dibing you could be dibing they could be dibing
Perfect	V-ing perfect
I could have dibed you could have dibed she could have dibed we could have dibed you could have dibed they could have dibed	I could have been dibing you could have been dibing she could have been dibing we could have been dibing you could have been dibing they could have been dibing

Negation

Simple form	V-ing form
I could not dib you could not dib she could not dib we could not dib you could not dib they could not dib	I could not be dibing you could not be dibing she could not be dibing we could not be dibing you could not be dibing they could not be dibing
Perfect	V-ing perfect
I could not have dibed you could not have dibed she could not have dibed we could not have dibed you could not have dibed they could not have dibed	I could not have been dibing you could not have been dibing she could not have been dibing we could not have been dibing you could not have been dibing they could not have been dibing

Interrogative form

Simple form	V-ing form
could I dib? could you dib? could she dib? could we dib? could you dib? could they dib?	could I be dibing? could you be dibing? could she be dibing? could we be dibing? could you be dibing? could they be dibing?
Perfect	V-ing perfect
could I have dibed? could you have dibed? could she have dibed? could we have dibed? could you have dibed? could they have dibed?	could I have been dibing? could you have been dibing? could she have been dibing? could we have been dibing? could you have been dibing? could they have been dibing?

Interro-negative form

Simple form	V-ing form
could I not dib? could you not dib? could she not dib? could we not dib? could you not dib? could they not dib?	could I not be dibing? could you not be dibing? could she not be dibing? could we not be dibing? could you not be dibing? could they not be dibing?
Perfect	V-ing perfect
could I not have dibed? could you not have dibed? could she not have dibed? could we not have dibed? could you not have dibed? could they not have dibed?	could I not have been dibing? could you not have been dibing? could she not have been dibing? could we not have been dibing? could you not have been dibing? could they not have been dibing?