Clouds moved quickly.

Meaning: The collections of tiny water droplets or ice crystals in the sky changed position with a lot of speed.

Choice of Words: Clouds are collections of tiny water droplets or ice crystals in the sky. Moved is the past tense of move, which means to change position. Quickly means with a lot of speed.

Alternative Expressions

The clouds were racing by.

Meaning: This means that the clouds were moving very fast, as if they were in a race. It's like watching a car race, but with clouds instead of cars!

Choice of Words: The is used to refer to a specific thing. Clouds are large collections of water vapor in the sky that appear white or gray. Were is the past tense of the verb "to be," which means to exist or to be in a certain place. Racing means to move very quickly, like in a race. By means past something. When you put them together, "The clouds were racing by" describes the clouds moving quickly across the sky.

Look at the clouds zoom past.

Meaning: This means that the clouds are moving very quickly, so fast that it's like they're zooming past. It's like watching a rocket launch, but with clouds instead of rockets!

Choice of Words: Look means to turn your eyes in a particular direction. At means to focus your attention on something. The is used to refer to a specific thing. Clouds are large collections of water vapor in the sky that appear white or gray. Zoom means to move very quickly. Past means to move by something. When you put them together, "Look at the clouds zoom past" invites someone to observe the rapid movement of clouds in the sky.

Related Expressions