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