翻译为英文：到我起床之前，我母亲已经为我做好了早餐

My mother had made breakfast ready before I got up(过去时）或者
MY mother has made breakfast ready before I get up（一般现在时）

你好!如此翻译:

My mother has cooked the breakfast for me before I get up.

My mother has already finished my breakfast before my getting up.

My mother has made breakfast for me before I get up.