I could merge you could merge he could merge we could merge you could merge they could merge
V-ing form
I could be merging you could be merging he could be merging we could be merging you could be merging they could be merging
Perfect
I could have merged you could have merged he could have merged we could have merged you could have merged they could have merged
V-ing perfect
I could have been merging you could have been merging he could have been merging we could have been merging you could have been merging they could have been merging
Negation
Simple form
I could not merge you could not merge he could not merge we could not merge you could not merge they could not merge
V-ing form
I could not be merging you could not be merging he could not be merging we could not be merging you could not be merging they could not be merging
Perfect
I could not have merged you could not have merged he could not have merged we could not have merged you could not have merged they could not have merged
V-ing perfect
I could not have been merging you could not have been merging he could not have been merging we could not have been merging you could not have been merging they could not have been merging
Interrogative form
Simple form
could I merge? could you merge? could he merge? could we merge? could you merge? could they merge?
V-ing form
could I be merging? could you be merging? could he be merging? could we be merging? could you be merging? could they be merging?
Perfect
could I have merged? could you have merged? could he have merged? could we have merged? could you have merged? could they have merged?
V-ing perfect
could I have been merging? could you have been merging? could he have been merging? could we have been merging? could you have been merging? could they have been merging?
Interro-negative form
Simple form
could I not merge? could you not merge? could he not merge? could we not merge? could you not merge? could they not merge?
V-ing form
could I not be merging? could you not be merging? could he not be merging? could we not be merging? could you not be merging? could they not be merging?
Perfect
could I not have merged? could you not have merged? could he not have merged? could we not have merged? could you not have merged? could they not have merged?
V-ing perfect
could I not have been merging? could you not have been merging? could he not have been merging? could we not have been merging? could you not have been merging? could they not have been merging?