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 couldn't atone you couldn't atone he couldn't atone we couldn't atone you couldn't atone they couldn't atone
V-ing form
I couldn't be atoning you couldn't be atoning he couldn't be atoning we couldn't be atoning you couldn't be atoning they couldn't be atoning
Perfect
I couldn't have atoned you couldn't have atoned he couldn't have atoned we couldn't have atoned you couldn't have atoned they couldn't have atoned
V-ing perfect
I couldn't have been atoning you couldn't have been atoning he couldn't have been atoning we couldn't have been atoning you couldn't have been atoning they couldn't 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
couldn't I atone? couldn't you atone? couldn't he atone? couldn't we atone? couldn't you atone? couldn't they atone?
V-ing form
couldn't I be atoning? couldn't you be atoning? couldn't he be atoning? couldn't we be atoning? couldn't you be atoning? couldn't they be atoning?
Perfect
couldn't I have atoned? couldn't you have atoned? couldn't he have atoned? couldn't we have atoned? couldn't you have atoned? couldn't they have atoned?
V-ing perfect
couldn't I have been atoning? couldn't you have been atoning? couldn't he have been atoning? couldn't we have been atoning? couldn't you have been atoning? couldn't they have been atoning?