给定一篇英文文章，请将其中所有的动词转换为过去时态，并用新的文章输出。
原始文章：

The sun rises early in the morning and sets late in the evening. The birds sing sweetly in the trees as they fly to their nests. The river flows swiftly downstream and carries fish to and fro. The wind blows gently and rustles the leaves on the trees. The people in the town go about their business, rushing here and there.
The sun rose early in the morning and set late in the evening. The birds sang sweetly in the trees as they flew to their nests. The river flowed swiftly downstream and carried fish to and fro. The wind blew gently and rustled the leaves on the trees. The people in the town went about their business, rushing here and there.