英语短文改错 The Milu deer used to be common in China long before.As other deer they

问题描述:

英语短文改错 The Milu deer used to be common in China long before.As other deer they
lived together and eat grass and soft parts of trees such as small branch.
问:long before 里面的before 为什么 要变成ago .as 为什么变成like?

long ago =a long time ago 适用于过去时
long before 适用于过去完成时
Like other deer,像别的路那样
as.做介词,则表示,作为,没有像的意思.as 不是也有正如 像的意思么