About this resource:
understanding the concept of different speech levels and styles in Korean, and using sentence-final verb endings in three speech styles appropriately for the audience: -ㅂ/습니다, -ㅂ/습니까, -ㅂ/읍시다, -(으)십시오 (the formal polite style); -어/아요(the informal polite style); and -어/아 (the intimate style)
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http://rdf.australiancurriculum.edu.au/elements/2018/05/1fffa06f-255b-456e-b8ce-da988c0a3642.rdf