I could bronze you could bronze she could bronze we could bronze you could bronze they could bronze
V-ing form
I could be bronzing you could be bronzing she could be bronzing we could be bronzing you could be bronzing they could be bronzing
Perfect
I could have bronzed you could have bronzed she 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 she 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 she 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 she 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 she 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 she 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 she bronze? could we bronze? could you bronze? could they bronze?
V-ing form
could I be bronzing? could you be bronzing? could she be bronzing? could we be bronzing? could you be bronzing? could they be bronzing?
Perfect
could I have bronzed? could you have bronzed? could she 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 she 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 she 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 she 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 she 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 she have been bronzing? couldn't we have been bronzing? couldn't you have been bronzing? couldn't they have been bronzing?