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Fortunately is an adverb, yes.Some example sentences are:Fortunately, I have a backup copy.We fortunately arrive don time.
Fortunately
The suffix for the word "fortunately" is -ly.
"Fortunately, I was able to get to the wedding on time despite the traffic."
"He rolled all the way down the hill, but fortunately was not badly hurt."
When i was in the store it started raining, fortunately i had brought my umbrella