ヤンマ yanmaが gaすいすいと suisuito水(みず) mizuの no上(うえ) ueを o進(すす)ん()で()い()た() susundeita。 A dragonfly was gliding smoothly across the water. natureinsectsを (path of motion)adverbial と (after mimetics)~ていた (past progressive/state)すいすい (smooth movement mimetic)