飛(ひ)行(こう)機(き) hikoukiは wa雲(くも)の()上(うえ) kumonoueを o飛(と)ん()で() tondeいった itta。 The airplane flew away above the clouds. Literal Airplane [topic-は] clouds [possessive-の] above [path-を] flew-went. ~ていく here marks motion proceeding away from the observer — the plane flew over the clouds and receded into the distance. Contrast with ~てくる (motion toward the speaker). airplanestransportationを (path of motion)~ていく (motion away from speaker)
飛(ひ)行(こう)機(き) hikoukiは wa雲(くも)の()上(うえ) kumonoueを o飛(と)ん()で() tondeいった itta。 The airplane flew away above the clouds. Literal Airplane [topic-は] clouds [possessive-の] above [path-を] flew-went. ~ていく here marks motion proceeding away from the observer — the plane flew over the clouds and receded into the distance. Contrast with ~てくる (motion toward the speaker). airplanestransportationを (path of motion)~ていく (motion away from speaker)