I could acerbate you could acerbate he could acerbate we could acerbate you could acerbate they could acerbate
V-ing form
I could be acerbating you could be acerbating he could be acerbating we could be acerbating you could be acerbating they could be acerbating
Perfect
I could have acerbated you could have acerbated he could have acerbated we could have acerbated you could have acerbated they could have acerbated
V-ing perfect
I could have been acerbating you could have been acerbating he could have been acerbating we could have been acerbating you could have been acerbating they could have been acerbating
Negation
Simple form
I could not acerbate you could not acerbate he could not acerbate we could not acerbate you could not acerbate they could not acerbate
V-ing form
I could not be acerbating you could not be acerbating he could not be acerbating we could not be acerbating you could not be acerbating they could not be acerbating
Perfect
I could not have acerbated you could not have acerbated he could not have acerbated we could not have acerbated you could not have acerbated they could not have acerbated
V-ing perfect
I could not have been acerbating you could not have been acerbating he could not have been acerbating we could not have been acerbating you could not have been acerbating they could not have been acerbating
Interrogative form
Simple form
could I acerbate? could you acerbate? could he acerbate? could we acerbate? could you acerbate? could they acerbate?
V-ing form
could I be acerbating? could you be acerbating? could he be acerbating? could we be acerbating? could you be acerbating? could they be acerbating?
Perfect
could I have acerbated? could you have acerbated? could he have acerbated? could we have acerbated? could you have acerbated? could they have acerbated?
V-ing perfect
could I have been acerbating? could you have been acerbating? could he have been acerbating? could we have been acerbating? could you have been acerbating? could they have been acerbating?
Interro-negative form
Simple form
could I not acerbate? could you not acerbate? could he not acerbate? could we not acerbate? could you not acerbate? could they not acerbate?
V-ing form
could I not be acerbating? could you not be acerbating? could he not be acerbating? could we not be acerbating? could you not be acerbating? could they not be acerbating?
Perfect
could I not have acerbated? could you not have acerbated? could he not have acerbated? could we not have acerbated? could you not have acerbated? could they not have acerbated?
V-ing perfect
could I not have been acerbating? could you not have been acerbating? could he not have been acerbating? could we not have been acerbating? could you not have been acerbating? could they not have been acerbating?