I could shoot you could shoot she could shoot we could shoot you could shoot they could shoot
V-ing form
I could be shooting you could be shooting she could be shooting we could be shooting you could be shooting they could be shooting
Perfect
I could have shot you could have shot she could have shot we could have shot you could have shot they could have shot
V-ing perfect
I could have been shooting you could have been shooting she could have been shooting we could have been shooting you could have been shooting they could have been shooting
Negation
Simple form
I couldn't shoot you couldn't shoot she couldn't shoot we couldn't shoot you couldn't shoot they couldn't shoot
V-ing form
I couldn't be shooting you couldn't be shooting she couldn't be shooting we couldn't be shooting you couldn't be shooting they couldn't be shooting
Perfect
I couldn't have shot you couldn't have shot she couldn't have shot we couldn't have shot you couldn't have shot they couldn't have shot
V-ing perfect
I couldn't have been shooting you couldn't have been shooting she couldn't have been shooting we couldn't have been shooting you couldn't have been shooting they couldn't have been shooting
Interrogative form
Simple form
could I shoot? could you shoot? could she shoot? could we shoot? could you shoot? could they shoot?
V-ing form
could I be shooting? could you be shooting? could she be shooting? could we be shooting? could you be shooting? could they be shooting?
Perfect
could I have shot? could you have shot? could she have shot? could we have shot? could you have shot? could they have shot?
V-ing perfect
could I have been shooting? could you have been shooting? could she have been shooting? could we have been shooting? could you have been shooting? could they have been shooting?
Interro-negative form
Simple form
couldn't I shoot? couldn't you shoot? couldn't she shoot? couldn't we shoot? couldn't you shoot? couldn't they shoot?
V-ing form
couldn't I be shooting? couldn't you be shooting? couldn't she be shooting? couldn't we be shooting? couldn't you be shooting? couldn't they be shooting?
Perfect
couldn't I have shot? couldn't you have shot? couldn't she have shot? couldn't we have shot? couldn't you have shot? couldn't they have shot?
V-ing perfect
couldn't I have been shooting? couldn't you have been shooting? couldn't she have been shooting? couldn't we have been shooting? couldn't you have been shooting? couldn't they have been shooting?