English verb conjugation
COULD REFURBISH

Regular verb: refurbish - refurbished - refurbished

Affirmation

Simple form	V-ing form
I could refurbish you could refurbish he could refurbish we could refurbish you could refurbish they could refurbish	I could be refurbishing you could be refurbishing he could be refurbishing we could be refurbishing you could be refurbishing they could be refurbishing
Perfect	V-ing perfect
I could have refurbished you could have refurbished he could have refurbished we could have refurbished you could have refurbished they could have refurbished	I could have been refurbishing you could have been refurbishing he could have been refurbishing we could have been refurbishing you could have been refurbishing they could have been refurbishing

Negation

Simple form	V-ing form
I couldn't refurbish you couldn't refurbish he couldn't refurbish we couldn't refurbish you couldn't refurbish they couldn't refurbish	I couldn't be refurbishing you couldn't be refurbishing he couldn't be refurbishing we couldn't be refurbishing you couldn't be refurbishing they couldn't be refurbishing
Perfect	V-ing perfect
I couldn't have refurbished you couldn't have refurbished he couldn't have refurbished we couldn't have refurbished you couldn't have refurbished they couldn't have refurbished	I couldn't have been refurbishing you couldn't have been refurbishing he couldn't have been refurbishing we couldn't have been refurbishing you couldn't have been refurbishing they couldn't have been refurbishing

Interrogative form

Simple form	V-ing form
could I refurbish? could you refurbish? could he refurbish? could we refurbish? could you refurbish? could they refurbish?	could I be refurbishing? could you be refurbishing? could he be refurbishing? could we be refurbishing? could you be refurbishing? could they be refurbishing?
Perfect	V-ing perfect
could I have refurbished? could you have refurbished? could he have refurbished? could we have refurbished? could you have refurbished? could they have refurbished?	could I have been refurbishing? could you have been refurbishing? could he have been refurbishing? could we have been refurbishing? could you have been refurbishing? could they have been refurbishing?

Interro-negative form

Simple form	V-ing form
couldn't I refurbish? couldn't you refurbish? couldn't he refurbish? couldn't we refurbish? couldn't you refurbish? couldn't they refurbish?	couldn't I be refurbishing? couldn't you be refurbishing? couldn't he be refurbishing? couldn't we be refurbishing? couldn't you be refurbishing? couldn't they be refurbishing?
Perfect	V-ing perfect
couldn't I have refurbished? couldn't you have refurbished? couldn't he have refurbished? couldn't we have refurbished? couldn't you have refurbished? couldn't they have refurbished?	couldn't I have been refurbishing? couldn't you have been refurbishing? couldn't he have been refurbishing? couldn't we have been refurbishing? couldn't you have been refurbishing? couldn't they have been refurbishing?