* "The artist's work was nationally recognized for its innovative style." (This sentence uses "nationally" as an adverb to describe the scope of the recognition.)
* "The company launched a nationally televised advertising campaign." (This sentence uses "nationally" to describe where the campaign was televised.)
* "The politician's views were in line with national opinion." (This sentence uses "national" as an adjective to describe the scope of the opinion.)
Remember that "nationally" is an adverb, meaning it modifies a verb, adjective, or another adverb.
Let me know if you'd like more examples or have other questions.