the same...as...表示"与……同样的",不是同一个
the same...that..表示"同一个",就是那个
例如：
This is the same pen as I lost last week.这同我上周丢失的那支钢笔一样.(但不是同一支)
This is the same pen that I lost last week.这就是我上周丢失的那支钢笔.
the same后面可以接定语从句,如果后面的定语从句是省略的情况,则用as来引导,即the same...as；
如果是完整的定语从句,须根据不同的先行词来确定用 that,when,where,when,who等.
例如:
He studies in the same school as I.他和我在同一所学校里上学.
He was born in the same hospital where my brother was born.他和我哥哥在同一家医院里出生.
The young teacher is the same man who visited our school last year.那个青年教师就是去年来我校参观的那个人.