英语翻译One day last spring,when the old man was having a walk i

英语翻译
One day last spring,when the old man was having a walk in the street,a wild dog at him and hurt him on the left leg with its mouth.请问为什么是at him?是不是少了什么词?
But sooner the neighbor had a stomachache and had trouble breathing.为什么用sooner不用soon?