cloud是可數名詞還是不可數名詞

The plane climbed until it was clear of the clouds.

飛機爬升直至穿出了雲層。

The sky was full of dark masses of clouds.

天空中烏雲密佈。

A cloud of dust rose as the truck drove off.

卡車開過時揚起一片灰塵。

The sun disappeared behind a bank of clouds.

太陽消失在一大片雲後面。

It was beginning to cloud over.

天空開始陰雲密佈。

The dark clouds in the sky meant that a storm was coming.

天空中的烏雲預示暴風雨即將來臨。