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"Time flies so fast" vs "Time is running so fast"

Both phrases are correct and commonly used to express the idea that time is passing quickly. They are interchangeable and convey the same meaning.

Last Updated: March 24, 2024

Time flies so fast

This is correct

This is a common idiom used in English to indicate that time seems to pass more quickly in certain situations.

ExpertExplanation provided by a TextRanch English expert

Preferred Form:
Time flies so quickly


Some examples from our editors:

  • Time flies so fast when you're having fun!
  • It's been so long since I've seen you -- I can't believe how fast the time flies!
  • My baby is already starting school; time flies so fast!

Some alternatives from our editors:

  • Time flies quickly.
  • The time has flown.
  • Time really flies.
  • The years have passed quickly.

Time is running so fast

This phrase is correct and can be used to convey the idea that time is passing quickly.

This phrase is also a valid way to express the concept of time passing quickly.

Examples:

  • I feel like time is running so fast lately.
  • Time is running so fast when you're busy.

Alternatives:

  • time is passing quickly
  • time is flying by
  • time is slipping away quickly
  • time is moving swiftly
  • time is going by so fast

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