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Time flies so fast vs Time fly so fast

It is important to make sure the subject (time) agrees with the verb (to fly). In this example, time is singular, so the verb must use the singular form flies.

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.

Explanation 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!

Time fly so fast

This is not correct. Don't use this phrase.

Subject-verb agreement:In this phrase, the subject, time,is singular (like he, she, or it), so it requires the singular verb, flies.

Explanation provided by a TextRanch English expert.

Preferred Form:
Time flies so quickly


Some alternatives from our editors:

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