How can you change the sentence Karl newsboy to declarative sentnece?

The sentence "Karl newsboy" is a phrase, not a sentence. It lacks a verb and a subject-verb agreement.

Here are some ways to turn it into a declarative sentence:

* "Karl is a newsboy." (This is the most straightforward option.)

* "Karl works as a newsboy."

* "Karl was a newsboy." (If it's about the past)

Let me know if you have another phrase you'd like to turn into a sentence!