I could atone you could atone he could atone we could atone you could atone they could atone
V-ing form
I could be atoning you could be atoning he could be atoning we could be atoning you could be atoning they could be atoning
Perfect
I could have atoned you could have atoned he could have atoned we could have atoned you could have atoned they could have atoned
V-ing perfect
I could have been atoning you could have been atoning he could have been atoning we could have been atoning you could have been atoning they could have been atoning
Negation
Simple form
I could not atone you could not atone he could not atone we could not atone you could not atone they could not atone
V-ing form
I could not be atoning you could not be atoning he could not be atoning we could not be atoning you could not be atoning they could not be atoning
Perfect
I could not have atoned you could not have atoned he could not have atoned we could not have atoned you could not have atoned they could not have atoned
V-ing perfect
I could not have been atoning you could not have been atoning he could not have been atoning we could not have been atoning you could not have been atoning they could not have been atoning
Interrogative form
Simple form
could I atone? could you atone? could he atone? could we atone? could you atone? could they atone?
V-ing form
could I be atoning? could you be atoning? could he be atoning? could we be atoning? could you be atoning? could they be atoning?
Perfect
could I have atoned? could you have atoned? could he have atoned? could we have atoned? could you have atoned? could they have atoned?
V-ing perfect
could I have been atoning? could you have been atoning? could he have been atoning? could we have been atoning? could you have been atoning? could they have been atoning?
Interro-negative form
Simple form
could I not atone? could you not atone? could he not atone? could we not atone? could you not atone? could they not atone?
V-ing form
could I not be atoning? could you not be atoning? could he not be atoning? could we not be atoning? could you not be atoning? could they not be atoning?
Perfect
could I not have atoned? could you not have atoned? could he not have atoned? could we not have atoned? could you not have atoned? could they not have atoned?
V-ing perfect
could I not have been atoning? could you not have been atoning? could he not have been atoning? could we not have been atoning? could you not have been atoning? could they not have been atoning?