What is another word for we a shown this?

The phrase "we a shown this" is grammatically incorrect. It seems you're trying to say something like "we have been shown this."

Here are some other ways to phrase that:

* We were shown this.

* This was shown to us.

* We've been presented with this.

* This has been brought to our attention.

* This has been demonstrated to us.

The best choice depends on the context and the desired tone.