I could abridge you could abridge he could abridge we could abridge you could abridge they could abridge
V-ing form
I could be abridging you could be abridging he could be abridging we could be abridging you could be abridging they could be abridging
Perfect
I could have abridged you could have abridged he could have abridged we could have abridged you could have abridged they could have abridged
V-ing perfect
I could have been abridging you could have been abridging he could have been abridging we could have been abridging you could have been abridging they could have been abridging
Negation
Simple form
I could not abridge you could not abridge he could not abridge we could not abridge you could not abridge they could not abridge
V-ing form
I could not be abridging you could not be abridging he could not be abridging we could not be abridging you could not be abridging they could not be abridging
Perfect
I could not have abridged you could not have abridged he could not have abridged we could not have abridged you could not have abridged they could not have abridged
V-ing perfect
I could not have been abridging you could not have been abridging he could not have been abridging we could not have been abridging you could not have been abridging they could not have been abridging
Interrogative form
Simple form
could I abridge? could you abridge? could he abridge? could we abridge? could you abridge? could they abridge?
V-ing form
could I be abridging? could you be abridging? could he be abridging? could we be abridging? could you be abridging? could they be abridging?
Perfect
could I have abridged? could you have abridged? could he have abridged? could we have abridged? could you have abridged? could they have abridged?
V-ing perfect
could I have been abridging? could you have been abridging? could he have been abridging? could we have been abridging? could you have been abridging? could they have been abridging?
Interro-negative form
Simple form
could I not abridge? could you not abridge? could he not abridge? could we not abridge? could you not abridge? could they not abridge?
V-ing form
could I not be abridging? could you not be abridging? could he not be abridging? could we not be abridging? could you not be abridging? could they not be abridging?
Perfect
could I not have abridged? could you not have abridged? could he not have abridged? could we not have abridged? could you not have abridged? could they not have abridged?
V-ing perfect
could I not have been abridging? could you not have been abridging? could he not have been abridging? could we not have been abridging? could you not have been abridging? could they not have been abridging?