关于英语ing问题问下It is a ture story about an overseas student livi

这个句子是现在分词短语作后置定语,其可以写为以下定语从句
It is a true story about an oversea student （who lives / lived） in Germany

现在分词和过去分词都可以做定语.

一般来说,现在分词是表示主动,分词动作与被修饰词间是主动关系,名词与后面的动词为主谓结构,还有表示正在进行的意思.
如果为动宾结构时,用过去分词,分词动作与被修饰词间是被动关系,表示被动 还有已经完成的意思,
给你找个例句看看吧!或许更利于你理解
Who were the so-called guests invited (=who had been invited) to your party last night?
昨晚被邀请参加你的晚会的那些所谓的客人是谁呀?
the so-called guests 和 invited之间是被动关系,所以用过去分词
Do you want to see the doctor working on the case report in the office?
你要见那位正在办公室里写病历的医生吗?
理解吗?希望对你有所帮助!

living in Germany 是解释student的，跟about没有关系。这里的living 相当于 who lives

动名词作定语，about只是引出句子，跟句式无关 ，改成定语从句就是：It is a true story about an overseas student who lives in Germany.

living是现在分词修饰student，如果要用live就要改成定于从句：It is a ture story about an overseas student which live in Germany

完整的句子为：
It is a ture story about an overseas student（who is被省略）living in Germany。
这里living表示现在仍然住在某个地方 。