1.   A swan glided across the surface of the lake.

2.   A swan was gliding across the lake.

3.   The swans glided over the surface of the lake.

4.   A swan glides into view, tracing a graceful path through the last of the light.

5.   A swan glides on a shimmering stream, where there had been only water.

6.   Quiet paths shaded by lindens and weeping willows edge the canals, where swans glide.

7.   Swans glide along the river banks.