I could coincide you could coincide she could coincide we could coincide you could coincide they could coincide
V-ing form
I could be coinciding you could be coinciding she could be coinciding we could be coinciding you could be coinciding they could be coinciding
Perfect
I could have coincided you could have coincided she could have coincided we could have coincided you could have coincided they could have coincided
V-ing perfect
I could have been coinciding you could have been coinciding she could have been coinciding we could have been coinciding you could have been coinciding they could have been coinciding
Negation
Simple form
I could not coincide you could not coincide she could not coincide we could not coincide you could not coincide they could not coincide
V-ing form
I could not be coinciding you could not be coinciding she could not be coinciding we could not be coinciding you could not be coinciding they could not be coinciding
Perfect
I could not have coincided you could not have coincided she could not have coincided we could not have coincided you could not have coincided they could not have coincided
V-ing perfect
I could not have been coinciding you could not have been coinciding she could not have been coinciding we could not have been coinciding you could not have been coinciding they could not have been coinciding
Interrogative form
Simple form
could I coincide? could you coincide? could she coincide? could we coincide? could you coincide? could they coincide?
V-ing form
could I be coinciding? could you be coinciding? could she be coinciding? could we be coinciding? could you be coinciding? could they be coinciding?
Perfect
could I have coincided? could you have coincided? could she have coincided? could we have coincided? could you have coincided? could they have coincided?
V-ing perfect
could I have been coinciding? could you have been coinciding? could she have been coinciding? could we have been coinciding? could you have been coinciding? could they have been coinciding?
Interro-negative form
Simple form
could I not coincide? could you not coincide? could she not coincide? could we not coincide? could you not coincide? could they not coincide?
V-ing form
could I not be coinciding? could you not be coinciding? could she not be coinciding? could we not be coinciding? could you not be coinciding? could they not be coinciding?
Perfect
could I not have coincided? could you not have coincided? could she not have coincided? could we not have coincided? could you not have coincided? could they not have coincided?
V-ing perfect
could I not have been coinciding? could you not have been coinciding? could she not have been coinciding? could we not have been coinciding? could you not have been coinciding? could they not have been coinciding?