你的问题很模糊,大概不是想知道 say 和 someone 的基本意思吧.下面就他们的特殊用法做一些粗略的介绍.
一、动词 say 除了表示“用言语表达”外,还可以表示用非语言方式来表达：
1、表明/体现/显示,如：
The clock says half past two.现在（显示出来的）时间是两点半.
It was an act that said “devotion.” 那个行为是象征“信仰”上的皈依.
The look on his face said that he was confident of success.他脸上的表情显示他对成功具有信心.
2.比如说/假定”,如：
Say your plan fails; then what do we do?比方说你的计划失败了,那末我们怎么办呢?
Let's say that you're right.我们假设你是对的.
二、someone 和 somebody 可以用作名词,表示“有相当身分的人”或“重要人物”,如：
He was someone in the law division.他在法律部门是个人物.
"Before she came around," she says,"I was somesome in this town."“她来之前,”她说道,“我在这个镇上也算得上个人物了.”
He thinks himself to be somebody.他自以为是个大人物.
Obviously she was somebody — a real presence in the room. 很显然她是个重要人物——是屋子里真正举足轻重的人.
另外也可以表示不知名姓的人,如：
Was that someone else aware of the accident?另外那个不知姓名的人也知道这个事故吗?