I could move you could move he could move we could move you could move they could move
V-ing form
I could be moving you could be moving he could be moving we could be moving you could be moving they could be moving
Perfect
I could have moved you could have moved he could have moved we could have moved you could have moved they could have moved
V-ing perfect
I could have been moving you could have been moving he could have been moving we could have been moving you could have been moving they could have been moving
Negation
Simple form
I could not move you could not move he could not move we could not move you could not move they could not move
V-ing form
I could not be moving you could not be moving he could not be moving we could not be moving you could not be moving they could not be moving
Perfect
I could not have moved you could not have moved he could not have moved we could not have moved you could not have moved they could not have moved
V-ing perfect
I could not have been moving you could not have been moving he could not have been moving we could not have been moving you could not have been moving they could not have been moving
Interrogative form
Simple form
could I move? could you move? could he move? could we move? could you move? could they move?
V-ing form
could I be moving? could you be moving? could he be moving? could we be moving? could you be moving? could they be moving?
Perfect
could I have moved? could you have moved? could he have moved? could we have moved? could you have moved? could they have moved?
V-ing perfect
could I have been moving? could you have been moving? could he have been moving? could we have been moving? could you have been moving? could they have been moving?
Interro-negative form
Simple form
could I not move? could you not move? could he not move? could we not move? could you not move? could they not move?
V-ing form
could I not be moving? could you not be moving? could he not be moving? could we not be moving? could you not be moving? could they not be moving?
Perfect
could I not have moved? could you not have moved? could he not have moved? could we not have moved? could you not have moved? could they not have moved?
V-ing perfect
could I not have been moving? could you not have been moving? could he not have been moving? could we not have been moving? could you not have been moving? could they not have been moving?