I was reading some examples of relative pronouns on the website http://www.gingersoftware.org.uk I was reading some examples of relative pronouns. com/content/grammar-rules/relative-pronouns/

There’s an example of this.

The store in the corner, where we usually buy all of our art supplies, burned to the ground.

How can I be correct and what is the best way? Shouldn’t we use was before the burned, I think write sentence should be

The store on the corner, where we usually buy all of our art supplies,was burned to the ground. I thought why one is still confused?

I have second thoughts. First I just want to be sure that second sentence is right, if not,

i must be missing something.