the city is built (where) three rivers come together.括号里换为in the place where为什么不对？

the city is built (where) three rivers come together.是宾语从句，where three rivers come together做宾语。

如果换成in the place where ，place做的是宾语，where引导的是place的定语，这样句式就有变化了。

换为in the place where 也不能算错，但是这样考察点就发生了很大的变化。