As Days Goes By vs. As Days Go By – Which is Correct?

As days go by is correct because “days” is plural and takes “go,” not “goes.” The expression means “as time passes.” “As days goes by” is a subject-verb agreement error, although “as the day goes by” is correct when “day” is singular. Use the plural noun with the plural verb.

As Days Goes By or As Days Go By – Which Is Correct?

As days go by is the grammatically correct expression. The noun days is plural, so it must be followed by the plural verb go. The phrase means “as time passes” or “over time.”

As days goes by is incorrect because goes is the singular form of the verb. It would be correct with a singular subject, as in as the day goes by or as time goes by.

The Best Trick to Remember the Difference

Use the subject-verb swap test: replace days with day. The singular sentence is as the day goes by. When you make the subject plural, remove the -es from the verb: as the days go by. Plural subjects use go; singular subjects use goes.

Word	Part of Speech	Meaning	Example
as days go by	Fixed adverbial phrase	As time passes	As days go by, the new routine feels easier.
as days goes by	Incorrect phrase	Intended to mean “as time passes,” but it has an agreement error	Use as days go by instead.

How to Use As Days Go By

As days go by is a fixed adverbial phrase that describes a gradual change over time. It can introduce a clause at the beginning of a sentence or appear later in the sentence. The phrase is neutral in tone and works in casual conversation, professional writing, personal essays, news writing, and literature.

The phrase commonly describes changing feelings, developing situations, increasing knowledge, or the gradual effects of time. It is similar to as time passes, over time, and with each passing day.

Example 1: As days go by, she becomes more confident in her new position.

Example 2: The memories grew less painful as days went by.

Example 3: As days go by, the benefits of the training become increasingly clear.

Etymology of the Phrase As Days Go By

The phrase combines the conjunction as, the plural noun days, and the verb phrase go by. In this expression, go by means “pass,” a meaning that developed from the broader idea of something moving past a person or point. Together, the words literally suggest days passing one after another.

Related Concepts

Understanding subject-verb agreement and verb phrases makes the difference between these two expressions easy to recognize.

• Subject-verb agreement: A verb must agree with its subject in number. A singular subject takes goes, while a plural subject takes go.
• Plural nouns: Days is the plural form of day. Because it refers to more than one day, it requires the plural verb go.
• Phrasal verbs: Go by is a phrasal verb meaning “pass,” especially when referring to time. Its form changes according to the subject and tense.
• Adverbial phrases: As days go by functions as an adverbial phrase because it explains when or under what circumstances something happens.

Examples from Media and Literature

The correct grammatical pattern appears widely in titles and descriptions involving the passage of time. Related expressions may use the singular form when their subject is singular.

• As Time Goes By: This well-known title uses goes because time is a singular, uncountable noun.
• As the Days Go By: Titles and passages using this wording correctly pair the plural subject days with the plural verb go.
• Personal narratives: Writers often use sentences such as “As days go by, the traveler grows accustomed to the unfamiliar surroundings” to show gradual change.
• News and feature writing: Reports may describe a developing situation with wording such as “As days go by, more information becomes available.”
• Poetry and song lyrics: The phrase is frequently used to express nostalgia, emotional healing, or the steady movement of time.

As Days Go By Synonyms

Synonym	Definition
As time passes	As time continues to move forward
Over time	Gradually or during the course of time
With each passing day	A little more each day
As time goes on	As a situation continues into the future
Gradually	Slowly or by degrees

Frequently Asked Questions

Question 1: Is “as days go by” grammatically correct?
Yes. As days go by is correct because the plural subject days takes the plural verb go.

Question 2: Why is “as days goes by” wrong?
As days goes by contains a subject-verb agreement error. Goes is singular, but days is plural. The correct form is as days go by.

Question 3: Is “as the day goes by” correct?
Yes. In as the day goes by, the subject day is singular, so the singular verb goes is required.

Question 4: What is the difference between “as days go by” and “as time goes by”?
Both expressions mean “as time passes.” Days is plural and takes go, while time is singular and takes goes.

Conclusion

Use as days go by, not as days goes by. The plural noun days requires the plural verb go. Remember that as the day goes by and as time goes by are correct because day and time are singular. Pro Tip: Correct subject-verb agreement strengthens your credibility and helps your professional writing appear polished and reliable.