I could bridge you could bridge he could bridge we could bridge you could bridge they could bridge
V-ing form
I could be bridging you could be bridging he could be bridging we could be bridging you could be bridging they could be bridging
Perfect
I could have bridged you could have bridged he could have bridged we could have bridged you could have bridged they could have bridged
V-ing perfect
I could have been bridging you could have been bridging he could have been bridging we could have been bridging you could have been bridging they could have been bridging
Negation
Simple form
I could not bridge you could not bridge he could not bridge we could not bridge you could not bridge they could not bridge
V-ing form
I could not be bridging you could not be bridging he could not be bridging we could not be bridging you could not be bridging they could not be bridging
Perfect
I could not have bridged you could not have bridged he could not have bridged we could not have bridged you could not have bridged they could not have bridged
V-ing perfect
I could not have been bridging you could not have been bridging he could not have been bridging we could not have been bridging you could not have been bridging they could not have been bridging
Interrogative form
Simple form
could I bridge? could you bridge? could he bridge? could we bridge? could you bridge? could they bridge?
V-ing form
could I be bridging? could you be bridging? could he be bridging? could we be bridging? could you be bridging? could they be bridging?
Perfect
could I have bridged? could you have bridged? could he have bridged? could we have bridged? could you have bridged? could they have bridged?
V-ing perfect
could I have been bridging? could you have been bridging? could he have been bridging? could we have been bridging? could you have been bridging? could they have been bridging?
Interro-negative form
Simple form
could I not bridge? could you not bridge? could he not bridge? could we not bridge? could you not bridge? could they not bridge?
V-ing form
could I not be bridging? could you not be bridging? could he not be bridging? could we not be bridging? could you not be bridging? could they not be bridging?
Perfect
could I not have bridged? could you not have bridged? could he not have bridged? could we not have bridged? could you not have bridged? could they not have bridged?
V-ing perfect
could I not have been bridging? could you not have been bridging? could he not have been bridging? could we not have been bridging? could you not have been bridging? could they not have been bridging?