请问各位老师，下面的句子中because引导because you'reolder than me的是主语从句吗？
Just becauseyou're older than me doesn't mean you know everything.
我感觉because引导的从句在这里有表示让步的意思，请问这个理解对吗？
我看到有人把这个句子改写成：Just becauseyou're older than me， doesn't mean you know everything. 请问这个时候because是引导让步状语从句吗？另外我在网上找了半天，没找到其它"Justbecause+ 从句，主句"这种结构的例句。请问如此改写表达地道吗？谢谢！
剑桥英语语法对because从句作主语和表语的例句和讲解如下：
i Because some body parts have already been turned into commodities does not mean that an increasing trade in kidneys is desirable.
ii The reason I didn’t call you was because the phone was out of order.
Because could be replaced by the fact that in [i], that in [ii], and these latter versions would be widely preferred in formal style. In the subject structure [i], because is often modified by just, and the matrix VP is more or less restricted to doesn’t mean: Just because you’re older than me doesn’t mean you can order me around.
because从句作主语（常被just修饰）,because 可被 the fact that 替换。当主语为the reason时，because从句作表语，because可以被that替换。正式语体更倾向于用后二种结构，托福考试把the reason作主语，because从句作表语根据错误对待，即觉得需要用that引导表语从句。也就是说以上二个例句中的because从句作主语和表语，都是非正式语体使用方法。
