I could shock you could shock he could shock we could shock you could shock they could shock
V-ing form
I could be shocking you could be shocking he could be shocking we could be shocking you could be shocking they could be shocking
Perfect
I could have shocked you could have shocked he could have shocked we could have shocked you could have shocked they could have shocked
V-ing perfect
I could have been shocking you could have been shocking he could have been shocking we could have been shocking you could have been shocking they could have been shocking
Negation
Simple form
I could not shock you could not shock he could not shock we could not shock you could not shock they could not shock
V-ing form
I could not be shocking you could not be shocking he could not be shocking we could not be shocking you could not be shocking they could not be shocking
Perfect
I could not have shocked you could not have shocked he could not have shocked we could not have shocked you could not have shocked they could not have shocked
V-ing perfect
I could not have been shocking you could not have been shocking he could not have been shocking we could not have been shocking you could not have been shocking they could not have been shocking
Interrogative form
Simple form
could I shock? could you shock? could he shock? could we shock? could you shock? could they shock?
V-ing form
could I be shocking? could you be shocking? could he be shocking? could we be shocking? could you be shocking? could they be shocking?
Perfect
could I have shocked? could you have shocked? could he have shocked? could we have shocked? could you have shocked? could they have shocked?
V-ing perfect
could I have been shocking? could you have been shocking? could he have been shocking? could we have been shocking? could you have been shocking? could they have been shocking?
Interro-negative form
Simple form
could I not shock? could you not shock? could he not shock? could we not shock? could you not shock? could they not shock?
V-ing form
could I not be shocking? could you not be shocking? could he not be shocking? could we not be shocking? could you not be shocking? could they not be shocking?
Perfect
could I not have shocked? could you not have shocked? could he not have shocked? could we not have shocked? could you not have shocked? could they not have shocked?
V-ing perfect
could I not have been shocking? could you not have been shocking? could he not have been shocking? could we not have been shocking? could you not have been shocking? could they not have been shocking?