I could revert you could revert he could revert we could revert you could revert they could revert
V-ing form
I could be reverting you could be reverting he could be reverting we could be reverting you could be reverting they could be reverting
Perfect
I could have reverted you could have reverted he could have reverted we could have reverted you could have reverted they could have reverted
V-ing perfect
I could have been reverting you could have been reverting he could have been reverting we could have been reverting you could have been reverting they could have been reverting
Negation
Simple form
I could not revert you could not revert he could not revert we could not revert you could not revert they could not revert
V-ing form
I could not be reverting you could not be reverting he could not be reverting we could not be reverting you could not be reverting they could not be reverting
Perfect
I could not have reverted you could not have reverted he could not have reverted we could not have reverted you could not have reverted they could not have reverted
V-ing perfect
I could not have been reverting you could not have been reverting he could not have been reverting we could not have been reverting you could not have been reverting they could not have been reverting
Interrogative form
Simple form
could I revert? could you revert? could he revert? could we revert? could you revert? could they revert?
V-ing form
could I be reverting? could you be reverting? could he be reverting? could we be reverting? could you be reverting? could they be reverting?
Perfect
could I have reverted? could you have reverted? could he have reverted? could we have reverted? could you have reverted? could they have reverted?
V-ing perfect
could I have been reverting? could you have been reverting? could he have been reverting? could we have been reverting? could you have been reverting? could they have been reverting?
Interro-negative form
Simple form
could I not revert? could you not revert? could he not revert? could we not revert? could you not revert? could they not revert?
V-ing form
could I not be reverting? could you not be reverting? could he not be reverting? could we not be reverting? could you not be reverting? could they not be reverting?
Perfect
could I not have reverted? could you not have reverted? could he not have reverted? could we not have reverted? could you not have reverted? could they not have reverted?
V-ing perfect
could I not have been reverting? could you not have been reverting? could he not have been reverting? could we not have been reverting? could you not have been reverting? could they not have been reverting?