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