I could bronze you could bronze he could bronze we could bronze you could bronze they could bronze
V-ing form
I could be bronzing you could be bronzing he could be bronzing we could be bronzing you could be bronzing they could be bronzing
Perfect
I could have bronzed you could have bronzed he could have bronzed we could have bronzed you could have bronzed they could have bronzed
V-ing perfect
I could have been bronzing you could have been bronzing he could have been bronzing we could have been bronzing you could have been bronzing they could have been bronzing
Negation
Simple form
I couldn't bronze you couldn't bronze he couldn't bronze we couldn't bronze you couldn't bronze they couldn't bronze
V-ing form
I couldn't be bronzing you couldn't be bronzing he couldn't be bronzing we couldn't be bronzing you couldn't be bronzing they couldn't be bronzing
Perfect
I couldn't have bronzed you couldn't have bronzed he couldn't have bronzed we couldn't have bronzed you couldn't have bronzed they couldn't have bronzed
V-ing perfect
I couldn't have been bronzing you couldn't have been bronzing he couldn't have been bronzing we couldn't have been bronzing you couldn't have been bronzing they couldn't have been bronzing
Interrogative form
Simple form
could I bronze? could you bronze? could he bronze? could we bronze? could you bronze? could they bronze?
V-ing form
could I be bronzing? could you be bronzing? could he be bronzing? could we be bronzing? could you be bronzing? could they be bronzing?
Perfect
could I have bronzed? could you have bronzed? could he have bronzed? could we have bronzed? could you have bronzed? could they have bronzed?
V-ing perfect
could I have been bronzing? could you have been bronzing? could he have been bronzing? could we have been bronzing? could you have been bronzing? could they have been bronzing?
Interro-negative form
Simple form
couldn't I bronze? couldn't you bronze? couldn't he bronze? couldn't we bronze? couldn't you bronze? couldn't they bronze?
V-ing form
couldn't I be bronzing? couldn't you be bronzing? couldn't he be bronzing? couldn't we be bronzing? couldn't you be bronzing? couldn't they be bronzing?
Perfect
couldn't I have bronzed? couldn't you have bronzed? couldn't he have bronzed? couldn't we have bronzed? couldn't you have bronzed? couldn't they have bronzed?
V-ing perfect
couldn't I have been bronzing? couldn't you have been bronzing? couldn't he have been bronzing? couldn't we have been bronzing? couldn't you have been bronzing? couldn't they have been bronzing?