could refurbish
Regular verb: refurbish - refurbished- refurbished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?