Bob已经在北京住了两年半了.（英语翻译）
问题描述：
Bob已经在北京住了两年半了.（英语翻译）
答
Bob has lived in Beijing for two years and a half.
It is two years and a half since Bob lived in Beijing .
Two years and a half has passed since Bob lived in Beijing ..
答
Bob has been living in beijing for a half and two years in Beijing.
答
Bob has been (living）in Beijing for two years and a half.