I could beacon you could beacon he could beacon we could beacon you could beacon they could beacon
V-ing form
I could be beaconing you could be beaconing he could be beaconing we could be beaconing you could be beaconing they could be beaconing
Perfect
I could have beaconed you could have beaconed he could have beaconed we could have beaconed you could have beaconed they could have beaconed
V-ing perfect
I could have been beaconing you could have been beaconing he could have been beaconing we could have been beaconing you could have been beaconing they could have been beaconing
Negation
Simple form
I could not beacon you could not beacon he could not beacon we could not beacon you could not beacon they could not beacon
V-ing form
I could not be beaconing you could not be beaconing he could not be beaconing we could not be beaconing you could not be beaconing they could not be beaconing
Perfect
I could not have beaconed you could not have beaconed he could not have beaconed we could not have beaconed you could not have beaconed they could not have beaconed
V-ing perfect
I could not have been beaconing you could not have been beaconing he could not have been beaconing we could not have been beaconing you could not have been beaconing they could not have been beaconing
Interrogative form
Simple form
could I beacon? could you beacon? could he beacon? could we beacon? could you beacon? could they beacon?
V-ing form
could I be beaconing? could you be beaconing? could he be beaconing? could we be beaconing? could you be beaconing? could they be beaconing?
Perfect
could I have beaconed? could you have beaconed? could he have beaconed? could we have beaconed? could you have beaconed? could they have beaconed?
V-ing perfect
could I have been beaconing? could you have been beaconing? could he have been beaconing? could we have been beaconing? could you have been beaconing? could they have been beaconing?
Interro-negative form
Simple form
could I not beacon? could you not beacon? could he not beacon? could we not beacon? could you not beacon? could they not beacon?
V-ing form
could I not be beaconing? could you not be beaconing? could he not be beaconing? could we not be beaconing? could you not be beaconing? could they not be beaconing?
Perfect
could I not have beaconed? could you not have beaconed? could he not have beaconed? could we not have beaconed? could you not have beaconed? could they not have beaconed?
V-ing perfect
could I not have been beaconing? could you not have been beaconing? could he not have been beaconing? could we not have been beaconing? could you not have been beaconing? could they not have been beaconing?