英语句子成分分析Is this the museum where the exhibition was held?请分析

这是一个定语从句,Is this the museum where the exhibition was held?
原句是个疑问句,变为陈述句为：This is the museum where the exhibition was held?
This是主语 is是谓语动词 the museum是宾语,同时也是定语从句 where the exhibition was held的先行词,
在这个定语where the exhibition was held里,where是引导词,was held是个被动语态,“被开”的意思

Is (系动词)this（主语） the museum（表语） where the exhibition was held（定语从句）?
细分为 this is the museum where the exhibition was held.
可改为简单的复合句 this is the museum and the exhibition was held there.

更深层次说这是个倒装句.
即是The museum is this where the exhibition was held.的完全倒装.
this be/there be/...都是这个样子