She says,"Something is wrong with my mootorbike."改为间接引语时为什么要

因为是一般现在时
She says something is wrong with her motorbike.
再问： 一般现在时不是应该改为was吗？
再答： 谁说的。。。 She says是一般现在时，不用改。 She said是一般过去是，要改。