English verb conjugation
COULD OVERDUB

Regular verb: overdub - overdubed - overdubed

Affirmation

Simple form	V-ing form
I could overdub you could overdub he could overdub we could overdub you could overdub they could overdub	I could be overdubing you could be overdubing he could be overdubing we could be overdubing you could be overdubing they could be overdubing
Perfect	V-ing perfect
I could have overdubed you could have overdubed he could have overdubed we could have overdubed you could have overdubed they could have overdubed	I could have been overdubing you could have been overdubing he could have been overdubing we could have been overdubing you could have been overdubing they could have been overdubing

Negation

Simple form	V-ing form
I could not overdub you could not overdub he could not overdub we could not overdub you could not overdub they could not overdub	I could not be overdubing you could not be overdubing he could not be overdubing we could not be overdubing you could not be overdubing they could not be overdubing
Perfect	V-ing perfect
I could not have overdubed you could not have overdubed he could not have overdubed we could not have overdubed you could not have overdubed they could not have overdubed	I could not have been overdubing you could not have been overdubing he could not have been overdubing we could not have been overdubing you could not have been overdubing they could not have been overdubing

Interrogative form

Simple form	V-ing form
could I overdub? could you overdub? could he overdub? could we overdub? could you overdub? could they overdub?	could I be overdubing? could you be overdubing? could he be overdubing? could we be overdubing? could you be overdubing? could they be overdubing?
Perfect	V-ing perfect
could I have overdubed? could you have overdubed? could he have overdubed? could we have overdubed? could you have overdubed? could they have overdubed?	could I have been overdubing? could you have been overdubing? could he have been overdubing? could we have been overdubing? could you have been overdubing? could they have been overdubing?

Interro-negative form

Simple form	V-ing form
could I not overdub? could you not overdub? could he not overdub? could we not overdub? could you not overdub? could they not overdub?	could I not be overdubing? could you not be overdubing? could he not be overdubing? could we not be overdubing? could you not be overdubing? could they not be overdubing?
Perfect	V-ing perfect
could I not have overdubed? could you not have overdubed? could he not have overdubed? could we not have overdubed? could you not have overdubed? could they not have overdubed?	could I not have been overdubing? could you not have been overdubing? could he not have been overdubing? could we not have been overdubing? could you not have been overdubing? could they not have been overdubing?