休(きゅう)暇(か) kyuukaの no計(けい)画(かく) keikakuを o予(あらかじ)め() arakajime立(た)て()て()い()る() tateteiru。 I'm planning my vacation in advance. Literal Vacation [possessive-の] plan [object-を] in-advance making. 予め 'in advance, beforehand' — a slightly formal adverb. 計画を立てる 'to make plans.' ~ている marks the action as currently in progress. Simple and practical. traveleveryday conversation~ている (ongoing state)
休(きゅう)暇(か) kyuukaの no計(けい)画(かく) keikakuを o予(あらかじ)め() arakajime立(た)て()て()い()る() tateteiru。 I'm planning my vacation in advance. Literal Vacation [possessive-の] plan [object-を] in-advance making. 予め 'in advance, beforehand' — a slightly formal adverb. 計画を立てる 'to make plans.' ~ている marks the action as currently in progress. Simple and practical. traveleveryday conversation~ている (ongoing state)