until the drain in the train dropped dry.请帮我语法分析,

they ()the train until it disappeared in the distance. in the dry They____the train until it disappesr in the distance. the drain of eternity Down The Drain 歌词 going down the drain circle the drain until the day when the sea dry out什么意思 请帮忙翻译—— I will love you until the seas run dry and the rocks They( ) the train until it disappeared in the forest.为什么是Wat in the train和on the train in the train station