How do you say how know me in Portuguese?

There are several ways to say "how do you know me" in Portuguese, depending on the context and level of formality. Here are a few options:

Formal:

* Como é que me conhece? - This is the most direct and formal way to say it.

* De que forma me conhece? - This is also formal and emphasizes the *way* you know the person.

Informal:

* Como você me conhece? - This is the most common and casual way to say it.

* De onde você me conhece? - This literally means "where do you know me from?" and is a good way to ask if the person knows you from a specific place or event.

* Como sabe quem eu sou? - This is a more informal and direct way to say "How do you know who I am?"

Adding Emphasis:

You can add emphasis to any of these phrases by adding a word like "bem" (well) or "realmente" (really) at the beginning, for example:

* Bem, como você me conhece?

* Realmente, como é que me conhece?

It's important to consider your relationship with the person you are speaking to when choosing the appropriate phrase.