这本来就是主动语态，这里的 gone 是形容词，不是过去分词。

你查一下词典就知道了，下面牛津词典的解释，你的问题请看第3条：

adj.

1. (of a thing 物品) used up 用完了；用光了：

'Where's the coffee?' 'It's all gone.' "

咖啡在哪儿？" "喝光了。"

2. (of a person 人) having left a place; away from a place 走了；离开了；不在：

'Is Tom here?' 'No, he was gone before I arrived'.

"汤姆在这儿吗？" "不在，我来之前他就走了。"

3. (formal)used to say that a particular situation no longer exists  不复存在；一去不复返：

The days are gone when you could leave your door unlocked at night.

夜不闭户的时代已经一去不复返了。

4. (BrE, informal) having been pregnant for the length of time mentioned 怀孕…时间了：

She's eight months gone.

她怀孕七个月了。

How far gone are you?

你怀孕几个月了？