English verb conjugation
COULD FURBISH

Regular verb: furbish - furbished - furbished

Affirmation

Simple form	V-ing form
I could furbish you could furbish he could furbish we could furbish you could furbish they could furbish	I could be furbishing you could be furbishing he could be furbishing we could be furbishing you could be furbishing they could be furbishing
Perfect	V-ing perfect
I could have furbished you could have furbished he could have furbished we could have furbished you could have furbished they could have furbished	I could have been furbishing you could have been furbishing he could have been furbishing we could have been furbishing you could have been furbishing they could have been furbishing

Negation

Simple form	V-ing form
I could not furbish you could not furbish he could not furbish we could not furbish you could not furbish they could not furbish	I could not be furbishing you could not be furbishing he could not be furbishing we could not be furbishing you could not be furbishing they could not be furbishing
Perfect	V-ing perfect
I could not have furbished you could not have furbished he could not have furbished we could not have furbished you could not have furbished they could not have furbished	I could not have been furbishing you could not have been furbishing he could not have been furbishing we could not have been furbishing you could not have been furbishing they could not have been furbishing

Interrogative form

Simple form	V-ing form
could I furbish? could you furbish? could he furbish? could we furbish? could you furbish? could they furbish?	could I be furbishing? could you be furbishing? could he be furbishing? could we be furbishing? could you be furbishing? could they be furbishing?
Perfect	V-ing perfect
could I have furbished? could you have furbished? could he have furbished? could we have furbished? could you have furbished? could they have furbished?	could I have been furbishing? could you have been furbishing? could he have been furbishing? could we have been furbishing? could you have been furbishing? could they have been furbishing?

Interro-negative form

Simple form	V-ing form
could I not furbish? could you not furbish? could he not furbish? could we not furbish? could you not furbish? could they not furbish?	could I not be furbishing? could you not be furbishing? could he not be furbishing? could we not be furbishing? could you not be furbishing? could they not be furbishing?
Perfect	V-ing perfect
could I not have furbished? could you not have furbished? could he not have furbished? could we not have furbished? could you not have furbished? could they not have furbished?	could I not have been furbishing? could you not have been furbishing? could he not have been furbishing? could we not have been furbishing? could you not have been furbishing? could they not have been furbishing?