I could override you could override he could override we could override you could override they could override
V-ing form
I could be overriding you could be overriding he could be overriding we could be overriding you could be overriding they could be overriding
Perfect
I could have overridden you could have overridden he could have overridden we could have overridden you could have overridden they could have overridden
V-ing perfect
I could have been overriding you could have been overriding he could have been overriding we could have been overriding you could have been overriding they could have been overriding
Negation
Simple form
I could not override you could not override he could not override we could not override you could not override they could not override
V-ing form
I could not be overriding you could not be overriding he could not be overriding we could not be overriding you could not be overriding they could not be overriding
Perfect
I could not have overridden you could not have overridden he could not have overridden we could not have overridden you could not have overridden they could not have overridden
V-ing perfect
I could not have been overriding you could not have been overriding he could not have been overriding we could not have been overriding you could not have been overriding they could not have been overriding
Interrogative form
Simple form
could I override? could you override? could he override? could we override? could you override? could they override?
V-ing form
could I be overriding? could you be overriding? could he be overriding? could we be overriding? could you be overriding? could they be overriding?
Perfect
could I have overridden? could you have overridden? could he have overridden? could we have overridden? could you have overridden? could they have overridden?
V-ing perfect
could I have been overriding? could you have been overriding? could he have been overriding? could we have been overriding? could you have been overriding? could they have been overriding?
Interro-negative form
Simple form
could I not override? could you not override? could he not override? could we not override? could you not override? could they not override?
V-ing form
could I not be overriding? could you not be overriding? could he not be overriding? could we not be overriding? could you not be overriding? could they not be overriding?
Perfect
could I not have overridden? could you not have overridden? could he not have overridden? could we not have overridden? could you not have overridden? could they not have overridden?
V-ing perfect
could I not have been overriding? could you not have been overriding? could he not have been overriding? could we not have been overriding? could you not have been overriding? could they not have been overriding?