"The boy is eating lunch."
Translation:Gutten spiser lunsj.
Norwegian does not form a continuous tense with 'to be' in the same way as English does.
You can always translate present continuous in English to simple present in Norwegian, and once you get to the Continuous chapter you'll learn more about explicitly expressing continuity in Norwegian. :)
if you translate "gutten er spiser lunsj" to english it will be the "the boy are is eating lunch