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 couldn't move you couldn't move he couldn't move we couldn't move you couldn't move they couldn't move
V-ing form
I couldn't be moving you couldn't be moving he couldn't be moving we couldn't be moving you couldn't be moving they couldn't be moving
Perfect
I couldn't have moved you couldn't have moved he couldn't have moved we couldn't have moved you couldn't have moved they couldn't have moved
V-ing perfect
I couldn't have been moving you couldn't have been moving he couldn't have been moving we couldn't have been moving you couldn't have been moving they couldn't 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
couldn't I move? couldn't you move? couldn't he move? couldn't we move? couldn't you move? couldn't they move?
V-ing form
couldn't I be moving? couldn't you be moving? couldn't he be moving? couldn't we be moving? couldn't you be moving? couldn't they be moving?
Perfect
couldn't I have moved? couldn't you have moved? couldn't he have moved? couldn't we have moved? couldn't you have moved? couldn't they have moved?
V-ing perfect
couldn't I have been moving? couldn't you have been moving? couldn't he have been moving? couldn't we have been moving? couldn't you have been moving? couldn't they have been moving?