hit→hitting 打、撞 cut→cutting 切、割 get→getting 取、得到 sit→sitting 坐 forget→forgetting 忘记 put→putting 放 set→setting 设置 babysit→babysitting 临时受雇照顾婴儿 2.shop→shopping 购物 trip→tripping 绊 stop→stopping 停止 drop→dropping...