云英文可数不可数

既是可数，也是不可数。 The sun went behind a cloud. The plane was flying in cloud most of the way.例句来自牛津词典

cloud意思为云、云朵，是不可数名词。“不存在two clouds的说法”但是存在复数形式clouds意为云、云彩。例句：the sun is hiding in the clouds.太阳躲在云彩里。（这里使用的是复数形式）the sun is hiding in a cloud.太阳躲在一朵云里。（这里是单数形式）

A cloud of dust rose as the truck drove off.

卡车开过时扬起一片灰尘。

The sun disappeared behind a bank of clouds.

太阳消失在一大片云后面。

It was beginning to cloud over.

天空开始阴云密布。

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

天空中的乌云预示暴风雨即将来临。

Doubts were beginning to cloud my mind.

种种疑问开始使我的思路变模糊了。