How do you say não entendo in Portuguese?

"Não entendo" in Portuguese can be said in a few different ways, depending on the context and desired level of formality:

Formal:

* Não compreendo: This is the most formal way to say "I don't understand."

* Eu não entendo: This is also quite formal, but slightly less so than "não compreendo."

Informal:

* Não entendo: This is the most common and informal way to say "I don't understand."

* Não estou entendendo: This is a bit more informal than "não entendo" and means "I'm not understanding."

* Não estou a entender: This is also a common informal way to say "I'm not understanding" in Portugal.

Other options:

* Não percebo: This means "I don't understand" and is more common in Portugal.

* Não estou a perceber: This means "I'm not understanding" and is also more common in Portugal.

It's important to note that "não entendo" is the most common and widely understood phrase, regardless of the context.