I could shoulder you could shoulder he could shoulder we could shoulder you could shoulder they could shoulder
V-ing form
I could be shouldering you could be shouldering he could be shouldering we could be shouldering you could be shouldering they could be shouldering
Perfect
I could have shouldered you could have shouldered he could have shouldered we could have shouldered you could have shouldered they could have shouldered
V-ing perfect
I could have been shouldering you could have been shouldering he could have been shouldering we could have been shouldering you could have been shouldering they could have been shouldering
Negation
Simple form
I could not shoulder you could not shoulder he could not shoulder we could not shoulder you could not shoulder they could not shoulder
V-ing form
I could not be shouldering you could not be shouldering he could not be shouldering we could not be shouldering you could not be shouldering they could not be shouldering
Perfect
I could not have shouldered you could not have shouldered he could not have shouldered we could not have shouldered you could not have shouldered they could not have shouldered
V-ing perfect
I could not have been shouldering you could not have been shouldering he could not have been shouldering we could not have been shouldering you could not have been shouldering they could not have been shouldering
Interrogative form
Simple form
could I shoulder? could you shoulder? could he shoulder? could we shoulder? could you shoulder? could they shoulder?
V-ing form
could I be shouldering? could you be shouldering? could he be shouldering? could we be shouldering? could you be shouldering? could they be shouldering?
Perfect
could I have shouldered? could you have shouldered? could he have shouldered? could we have shouldered? could you have shouldered? could they have shouldered?
V-ing perfect
could I have been shouldering? could you have been shouldering? could he have been shouldering? could we have been shouldering? could you have been shouldering? could they have been shouldering?
Interro-negative form
Simple form
could I not shoulder? could you not shoulder? could he not shoulder? could we not shoulder? could you not shoulder? could they not shoulder?
V-ing form
could I not be shouldering? could you not be shouldering? could he not be shouldering? could we not be shouldering? could you not be shouldering? could they not be shouldering?
Perfect
could I not have shouldered? could you not have shouldered? could he not have shouldered? could we not have shouldered? could you not have shouldered? could they not have shouldered?
V-ing perfect
could I not have been shouldering? could you not have been shouldering? could he not have been shouldering? could we not have been shouldering? could you not have been shouldering? could they not have been shouldering?