Clouds float by like cotton balls.

Meaning: The clouds are moving through the sky in a smooth and gentle way, similar to how cotton balls would float through the air.

Choice of Words: The verb float means to move smoothly and easily through the air or water. By shows the position or movement of something in relation to something else. Like is used to compare two things that are similar. Cotton balls are soft, fluffy balls made of cotton.

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Related Expressions