I could pocket you could pocket he could pocket we could pocket you could pocket they could pocket
V-ing form
I could be pocketing you could be pocketing he could be pocketing we could be pocketing you could be pocketing they could be pocketing
Perfect
I could have pocketed you could have pocketed he could have pocketed we could have pocketed you could have pocketed they could have pocketed
V-ing perfect
I could have been pocketing you could have been pocketing he could have been pocketing we could have been pocketing you could have been pocketing they could have been pocketing
Negation
Simple form
I could not pocket you could not pocket he could not pocket we could not pocket you could not pocket they could not pocket
V-ing form
I could not be pocketing you could not be pocketing he could not be pocketing we could not be pocketing you could not be pocketing they could not be pocketing
Perfect
I could not have pocketed you could not have pocketed he could not have pocketed we could not have pocketed you could not have pocketed they could not have pocketed
V-ing perfect
I could not have been pocketing you could not have been pocketing he could not have been pocketing we could not have been pocketing you could not have been pocketing they could not have been pocketing
Interrogative form
Simple form
could I pocket? could you pocket? could he pocket? could we pocket? could you pocket? could they pocket?
V-ing form
could I be pocketing? could you be pocketing? could he be pocketing? could we be pocketing? could you be pocketing? could they be pocketing?
Perfect
could I have pocketed? could you have pocketed? could he have pocketed? could we have pocketed? could you have pocketed? could they have pocketed?
V-ing perfect
could I have been pocketing? could you have been pocketing? could he have been pocketing? could we have been pocketing? could you have been pocketing? could they have been pocketing?
Interro-negative form
Simple form
could I not pocket? could you not pocket? could he not pocket? could we not pocket? could you not pocket? could they not pocket?
V-ing form
could I not be pocketing? could you not be pocketing? could he not be pocketing? could we not be pocketing? could you not be pocketing? could they not be pocketing?
Perfect
could I not have pocketed? could you not have pocketed? could he not have pocketed? could we not have pocketed? could you not have pocketed? could they not have pocketed?
V-ing perfect
could I not have been pocketing? could you not have been pocketing? could he not have been pocketing? could we not have been pocketing? could you not have been pocketing? could they not have been pocketing?