1.the same ...as 是固定结构,意思是“与...同样的”,as 是连词,连接比较对象的情况；不过口语中常常把 as 以看作介词,引入比较对象,以下两种讲法都是正确的：
* 连词：Gina's sister has the same age as I (do)
I do = I has the age,为了避免重复,用 do 代替了语境中已经出现过的词语,不过更为简洁的说法连 do 也省去.句子中主语Gina's sister 的比较对象是 I.
* 介词：Gina's sister has the same age as me.
2.the same to sb.也是一种固定结构,意思是“对某人是一样的”,如：
* She has been always the same to me.她对我始终如一.
* Wish you success.”“(The)same to you” 我也这样祝愿你.