she became a member of the Party ten years ago 是 she has joi

She became a member of the Party ten years ago.
是一般过去时.
She has joined in the Party since ten years ago.（×）
是现在完成时.动词需要用持续性动词,不能用短暂性动词join.搭配也不对,不说join in the Party.
所以第二个句子应该是
She has been a member of the Party since ten years ago.