"Your are walking" and "you walk" are the same in Hungarian because there's only one present tense. Here is the conjugation:
sétálok = I walk, sétálsz = you walk (singular), sétál = he/she walks, sétálunk = we walk, sétáltok = you walk (plural), sétálnak = they walk
Usually you don't have to use the pronoun (you) in the sentence because the conjugation already shows the person.
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I am guessing the imperative form (i.e., instructing someone "Walk!") is different than this?