Usages of de
Por la mañana caminamos hasta el lago y vemos el valle cubierto de nieve.
In the morning we walk to the lake and see the valley covered in snow.
Hoy el cielo está cubierto de nubes.
Today the sky is covered with clouds.
Durante el incendio, el cielo se llenó de humo gris y olía muy mal.
During the fire, the sky filled with gray smoke and it smelled very bad.
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