“don't spend too much time on football ,”mother said to me直接

首先我要申明我不能够给出100% sure的答案,因为你的这个句子本身就是一个口语句,也就是说不可能以正常的方式转换.
mother asked me not to spend too much time on football.
此处ask为要求的意思.
feel free to ask further if you want