There's nothing wrong with these sentences. g. g.
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AnnvanThere's nothing wrong with these sentences. However, "quickly" can not only be used to mean "immediately/in the near future" - as we use "soon" - it can also mean "fast" (e.g. 'He walked very quickly') or "briefly" (e.g. 'He waited only briefly'). So, no you can't always replace "quickly" with "soon".Please come soon.