Time Has Flew By or Time Has Flown By: Which Is Correct?

Have you ever looked back on a vacation, a school year, or a memorable experience and wondered how it ended so quickly? You might want to write, “Time has flew by,” but something about the sentence may seem incorrect. The confusion comes from the different forms of the verb fly. Understanding the difference between flew and flown will help you choose the correct expression in conversations, social media captions, emails, and formal writing.

Quick Answer

“Time has flown by” is correct, while “time has flew by” is grammatically incorrect in standard English.

The difference depends on the verb form used after has. The past tense of fly is flew, while its past participle is flown. Because the present perfect tense requires a past participle after has, the correct expression is “time has flown by.”

Expression	Correct?	Explanation
Time has flown by.	Yes	Uses the correct past participle.
Time has flew by.	No	Incorrectly uses the simple past tense after has.
Time flew by.	Yes	Uses the simple past tense correctly.
Time is flying by.	Yes	Uses the present progressive tense.
Time had flown by.	Yes	Uses the past perfect tense correctly.

Remember this verb pattern: Fly → Flew → Flown.

Meaning and Definition

Meaning of Time Has Flown By

“Time has flown by” means that time has passed very quickly. People commonly use this expression when they feel surprised by how quickly a period, event, or experience seems to have ended.

For example, someone might say, “Time has flown by since I started college.” This means that the period since starting college feels shorter than expected.

The expression is common in everyday conversations, personal reflections, birthday messages, graduation posts, and discussions about memorable experiences.

Definition of Time Has Flown By

“Time has flown by” is an idiomatic expression formed with the present perfect tense of the verb fly and the particle by. It describes the rapid passage of time, often emphasizing the speaker’s perception that a period has passed unexpectedly quickly.

The expression does not mean that time literally flies. Instead, it uses figurative language to describe how quickly people experience the passing of time.

For example:

“Another year has flown by, and we are already celebrating the holidays again.”

Here, the speaker emphasizes how quickly the year seems to have passed.

Meaning of Time Has Flew By

“Time has flew by” is an incorrect grammatical construction in standard English. People may use it when speaking casually because they confuse the past tense flew with the past participle flown.

The intended meaning is usually the same as “time has flown by.” However, the two expressions differ in grammatical correctness.

If you want to communicate that time has passed quickly, use “time has flown by.”

Definition of Time Has Flew By

“Time has flew by” is not a standard grammatical form of the expression. It combines the auxiliary verb has with flew, the simple past form of fly, instead of the required past participle flown.

The problem is the verb structure, not the intended meaning.

Incorrect: Time has flew by since graduation.

Correct: Time has flown by since graduation.

The corrected sentence follows the present perfect structure: subject + has + past participle.

Main Difference

The main difference between “time has flew by” and “time has flown by” is the grammatical form of the verb following has.

English verbs can have different forms depending on the tense and sentence structure. The verb fly is irregular, which means its past tense and past participle do not follow the usual pattern of adding -ed.

Here is how its forms work:

Verb Form	Grammatical Function	Example
Fly	Base form	Time can fly by quickly.
Flies	Present tense with a singular third-person subject	Time flies when you are having fun.
Flew	Simple past tense	Time flew by during the holiday.
Flown	Past participle	Time has flown by this year.
Flying	Present participle	Time is flying by.

The important distinction is that flew works as the simple past tense, while flown works as the past participle.

Use flew when describing a completed past experience without an auxiliary verb such as has. Use flown after has, have, or had when forming the perfect tenses.

Which One Is Correct?

“Time has flown by” is the correct expression in standard English. “Time has flew by” is incorrect because it uses the wrong verb form.

Both flew and flown are legitimate English words, but they serve different grammatical functions.

Consider these examples:

• Correct: Time flew by during our family vacation.
• Correct: Time has flown by since our family vacation.
• Incorrect: Time has flew by since our family vacation.

The first sentence uses the simple past tense to describe a completed experience. The second uses the present perfect tense to connect the passage of time with the present.

The third sentence incorrectly combines has with the simple past form flew.

This rule applies in both American and British English. Neither variety uses “time has flew by” as the standard grammatical form.

Grammar and Usage

Understanding the grammar behind this expression makes it easier to use correctly in different situations.

The Verb Forms of Fly

The verb fly is an irregular verb with three principal forms:

• Base form: Fly
• Simple past: Flew
• Past participle: Flown

These forms appear in different grammatical structures.

For example:

• Present: Time flies when we are enjoying ourselves.
• Past: Time flew by during the weekend.
• Present perfect: Time has flown by since January.
• Past perfect: Time had flown by before we realized it.
• Present progressive: Time is flying by.

Learning these forms helps prevent confusion in everyday writing and speech.

Why Has Flown Is Correct

The word has acts as an auxiliary verb, also called a helping verb. In the present perfect tense, it combines with a past participle.

The basic structure is:

Subject + has/have + past participle

Examples include:

• She has written the report.
• He has gone home.
• The weather has changed.
• Time has flown by.

In each sentence, the auxiliary verb works with the past participle to form the present perfect tense.

Because flown is the past participle of fly, it is the correct choice after has.

When to Use Flew

Use flew when describing something that happened in the past.

Examples:

• Time flew by during the concert.
• The afternoon flew by while we worked.
• The summer flew by before school started again.

These sentences do not require has because they use the simple past tense.

When to Use Flown

Use flown with an appropriate auxiliary verb when forming a perfect tense.

Examples:

• Time has flown by this year.
• The months have flown by since graduation.
• Time had flown by before we noticed the change.

The choice between has, have, and had depends on the subject and the intended tense.

Is the Expression Formal or Informal?

“Time has flown by” works in both informal and formal contexts.

You can use it in:

• Everyday conversations
• Emails to friends or colleagues
• Graduation speeches
• Personal essays
• Social media captions
• Reflective professional writing

The expression is natural and widely understood. In a highly technical or scientific document, a more literal phrase such as “the period passed quickly” may be more suitable.

How to Use Time Has Flown By

The expression “time has flown by” is useful when reflecting on a period that seems to have passed quickly. You can use it on its own or add information about a particular event or time period.

Use It to Reflect on the Past

Use this expression when looking back at an experience that began in the past and remains relevant to the present.

Examples:

• Time has flown by since I started university.
• Time has flown by since we moved into our new home.
• I cannot believe how quickly time has flown by.

These sentences emphasize the speaker’s surprise at the passage of time.

Use It for Special Occasions

The expression also works well when discussing birthdays, anniversaries, graduations, and other milestones.

Examples:

• Time has flown by, and today we are celebrating your graduation.
• It feels like yesterday that we met. Time has flown by.
• Time has flown by since our first family trip together.

These examples convey reflection and surprise without sounding overly formal.

Use It in Professional Communication

You can use the expression in workplace messages when discussing projects, employment milestones, or completed activities.

Examples:

• Time has flown by since I joined the company.
• The past six months have flown by, and our team has achieved several important goals.
• It is hard to believe how quickly this project period has flown by.

For formal reports, consider whether a more precise statement about the actual time period would communicate your point more clearly.

Use Flew When the Sentence Calls for Simple Past

You do not need has in every sentence about time passing quickly.

Examples:

• Time flew by during the workshop.
• The weekend flew by.
• Our school trip flew by because we were having so much fun.

These sentences describe completed past experiences, so flew is appropriate.

Examples

The following examples show how to use the correct expressions naturally.

Examples of Time Has Flown By

1. Time has flown by since the beginning of the year.
2. I cannot believe how quickly time has flown by.
3. Time has flown by since we graduated from school.
4. Another month has flown by, and the deadline is approaching.
5. Time has flown by since I started learning English.
6. The past few weeks have flown by because we have been busy.
7. Time has flown by, and our youngest child is already starting school.
8. It feels like yesterday that we moved here, but time has flown by.
9. Time has flown by since our first team meeting.
10. The semester has flown by, and final exams are almost here.
11. Time has flown by since I began working on this project.
12. Looking through these photographs reminds me how quickly time has flown by.

Examples of Time Flew By

1. Time flew by during our weekend trip.
2. The afternoon flew by while we talked.
3. Time flew by at the birthday party.
4. The school year flew by faster than I expected.
5. Our vacation flew by, and soon it was time to return home.
6. The meeting flew by because everyone was engaged.
7. Time flew by while we prepared for the festival.
8. The first day of college flew by.
9. The evening flew by as we played board games.
10. Time flew by during the final weeks of the semester.
11. The workshop flew by because the activities were interesting.
12. The summer flew by, and autumn arrived before we knew it.

Examples of Time Is Flying By

The present progressive form emphasizes that time seems to be passing quickly right now.

1. Time is flying by, and the exam is only a week away.
2. The holidays are approaching, and time is flying by.
3. Time is flying by while we prepare for the school event.
4. I cannot believe how quickly time is flying by this month.
5. The final minutes of the competition are flying by.

Examples of Time Had Flown By

The past perfect tense describes a period that had already passed quickly before another past event or realization.

1. Time had flown by before we realized the vacation was almost over.
2. By the time the project ended, several months had flown by.
3. We looked at the old photographs and realized that years had flown by.
4. Time had flown by before the students noticed that the lesson was ending.
5. By the time I returned to the city, many years had flown by.

Common Mistakes

Learners sometimes confuse flew and flown because both are associated with past events. The following mistakes illustrate how to avoid this problem.

Mistake 1: Using Flew After Has

Incorrect: Time has flew by so quickly.

Correct: Time has flown by so quickly.

Why it happens: People often assume that because flew describes the past, it must work after has. However, has requires a past participle in the present perfect tense.

Mistake 2: Using Flew After Have

Incorrect: The last few months have flew by.

Correct: The last few months have flown by.

Why it happens: The same verb rule applies to have. Whether the auxiliary is has or have, the past participle flown is required.

Mistake 3: Using Flew After Had

Incorrect: Time had flew by before we noticed.

Correct: Time had flown by before we noticed.

Why it happens: The past perfect tense uses had followed by a past participle. Therefore, flown is the correct form.

Mistake 4: Assuming Flew Is Always Incorrect

Incorrect assumption: You should never use flew when talking about time.

Correct: Time flew by during the holiday.

Why it happens: After learning that “time has flew by” is incorrect, some learners mistakenly avoid flew altogether.

Remember that flew is correct in the simple past tense. The mistake occurs when it follows has, have, or had in a perfect-tense construction.

Mistake 5: Adding Has When It Is Not Needed

Less suitable for a completed past event: Time has flown by during yesterday’s meeting.

More natural: Time flew by during yesterday’s meeting.

Why it happens: Learners sometimes use the present perfect automatically when talking about the past.

When a specific, completed past event is the focus, the simple past is often the more natural choice. However, the present perfect may be appropriate when the sentence connects the experience to the present.

Linguistic Insight

The difference between flew and flown provides a useful example of how English expresses grammatical relationships through verb forms.

Why Fly, Flew, and Flown Are Different

The verb fly is an irregular verb. Unlike regular verbs such as walk, which form the past tense and past participle as walked, fly has different forms:

• Fly
• Flew
• Flown

These forms developed through the historical evolution of English. Many common English verbs preserve older patterns rather than following the regular -ed ending.

The same general pattern appears in other irregular verbs, such as:

• Write, wrote, written
• Speak, spoke, spoken
• Break, broke, broken
• Drive, drove, driven

Recognizing these patterns can help learners remember irregular verb forms.

The Grammatical Role of the Past Participle

A past participle is a verb form used in perfect tenses and in certain passive constructions.

In “time has flown by,” the word has signals the present perfect tense, while flown supplies the required participle form.

This is a matter of syntax, which refers to the way words combine to form grammatical sentences.

English does not normally allow the simple past form to replace the past participle in this construction. That is why “time has flew by” is considered incorrect in standard English.

Why People Confuse Flew and Flown

The confusion is understandable because both forms refer to the same underlying verb and are associated with past events.

Learners may recognize flew as the past form but overlook the difference between the simple past and the past participle.

In addition, everyday speech often emphasizes meaning rather than explicit grammatical rules. A listener may understand the intended message even when the verb form is incorrect.

However, being understandable does not make every grammatical construction standard. In edited writing, academic work, and professional communication, “time has flown by” is the appropriate form.

Does American or British English Change the Rule?

No. The standard forms flew and flown are used in both American and British English.

There is no standard regional distinction that makes “time has flew by” correct in one variety but incorrect in the other.

The same rule applies regardless of accent or spelling convention: use flown after has, have, or had in perfect-tense constructions.

Usage Tips

Remembering a few simple rules will help you use the expression correctly.

Remember the Three Verb Forms

Learn this sequence:

Fly → Flew → Flown

Associate each form with its most common grammatical pattern:

• Fly: Birds fly across the sky.
• Flew: Time flew by yesterday.
• Flown: Time has flown by.

Practicing these examples aloud can help reinforce the difference.

Check the Helping Verb

Whenever you see has, have, or had before the main verb, check whether the past participle is needed.

For this verb, the pattern is:

• Has flown
• Have flown
• Had flown

Avoid using has flew, have flew, or had flew in standard English.

Think About the Time Frame

Ask yourself whether you are describing a completed past event or connecting a past experience to the present.

Use “time flew by” for a completed event in the past.

Use “time has flown by” when reflecting on a period that has passed and remains relevant now.

Use “time is flying by” when emphasizing that time seems to be passing quickly at the moment.

Read the Sentence Aloud

Reading a sentence aloud can help you notice an unfamiliar or awkward verb combination.

For example, compare:

• Time flew by during the holiday.
• Time has flown by during the holiday.

Both can work in suitable contexts, but the first presents the holiday as a completed past experience, while the second connects the passage of time to the present.

Focus on the grammatical structure as well as the meaning.

Expert Suggestion

As a grammar teacher, the simplest recommendation is to learn the principal forms of irregular verbs instead of memorizing isolated expressions.

When you learn fly, flew, flown, you can apply the same knowledge to many other sentences.

If you are writing an essay, email, article, or social media caption, check the verb that follows has, have, or had. In a perfect-tense construction, use the past participle.

For everyday writing, these patterns will usually guide you correctly:

• Time flew by during the event.
• Time has flown by since the event.
• Time had flown by before we realized it.

This approach improves grammatical accuracy without requiring you to memorize every possible sentence.

Summary

“Time has flown by” is the correct expression when you want to say that time has passed very quickly. It uses the present perfect tense, which requires the past participle flown after the auxiliary verb has.

“Time has flew by” is grammatically incorrect in standard English because flew is the simple past form of fly, not its past participle.

The essential verb pattern is fly → flew → flown.

Use “time flew by” when describing a completed past experience, “time has flown by” when connecting the passage of time to the present, and “time is flying by” when emphasizing that time seems to be passing quickly now.

These rules apply in both American and British English. Once you understand the difference between the simple past and the past participle, choosing the correct expression becomes much easier.

Frequently Asked Questions