Many English learners wonder whether time has flew by or time has flown by is the correct expression. Since both phrases contain forms of the verb fly, they can easily be confused. Understanding the difference is important because only one is grammatically correct in standard English. This guide explains the meanings, grammar rules, examples, and practical usage to help you use the correct phrase confidently.
Comparison Overview
Both “time has flew by” and “time has flown by” describe the feeling that time passed very quickly. However, they are not equally correct.
The confusion comes from the different forms of the irregular verb fly:
| Phrase | Correct? | Reason |
| Time has flew by | ❌ Incorrect | “Flew” is the simple past tense and cannot follow “has.” |
| Time has flown by | ✅ Correct | “Flown” is the past participle used with “has,” “have,” and “had.” |
In modern English, “time has flown by” is the only grammatically correct expression.
Definition of Time Has Flew By
“Time has flown by” is an incorrect English phrase.
It attempts to express that time passed quickly, but it incorrectly uses flew, which is the simple past tense of fly, after the helping verb has.
Core Meaning
The intended meaning is:
Time passed very quickly.
However, because of the incorrect verb form, native speakers and grammar experts consider this phrase grammatically incorrect.
Definition of Time Has Flown By
“Time has flown by” is the correct English expression.
It uses the past participle flown, which correctly follows the helping verb has in the present perfect tense.
Core Meaning
The phrase means:
- Time passed very quickly.
- The passage of time felt surprisingly fast.
It is commonly used in conversations, writing, speeches, books, and professional communication.
Main Differences Between Time Has Flew By and Time Has Flown By
| Feature | Time Has Flew By | Time Has Flown By |
| Grammar | ❌ Incorrect | ✅ Correct |
| Verb Form | Simple past (flew) | Past participle (flown) |
| Uses Present Perfect? | No | Yes |
| Suitable for Writing | No | Yes |
| Suitable for Speaking | No | Yes |
| Accepted in Standard English | No | Yes |
Key Difference
The main difference is grammatical.
- Flew = simple past.
- Flown = past participle.
Whenever you use has, have, or had, you need the past participle flown.
Verb Forms of “Fly”
Understanding the verb forms makes the comparison much easier.
| Base Verb | Simple Past | Past Participle |
| Fly | Flew | Flown |
Examples:
- Birds fly south.
- The bird flew yesterday.
- The bird has flown away.
The same rule applies to the expression “time has flown by.”
Why “Time Has Flown By” Is Correct
The phrase uses the present perfect tense, which follows this structure:
Subject + has/have + past participle
Formula:
Time + has + flown + by
Examples:
- Time has flown by.
- The years have flown by.
- My childhood has flown by.
Since flown is the past participle, the sentence is grammatically correct.
Grammar Guide
The verb fly is an irregular verb.
Its forms are:
- Base verb: fly
- Past tense: flew
- Past participle: flown
Whenever a helping verb such as has, have, or had appears, use flown, never flew.
How Each Term Is Used in Sentences
Time Has Flew By
❌ Incorrect:
- Time has flew by.
- The summer has flew by.
- The year has flew by.
These sentences are grammatically wrong.
Time Has Flown By
✅ Correct:
- Time has flown by.
- Summer has flown by.
- The holidays have flown by.
- Five years have flown by.
- Life has flown by.
Common Mistakes Learners Make
Some frequent mistakes include:
- Using flew after has.
- Confusing past tense with past participle.
- Assuming every past verb works after helping verbs.
- Forgetting irregular verb forms.
- Writing informal incorrect expressions.
Simple Rules to Remember
Remember these easy rules:
- Has + Flown ✅
- Have + Flown ✅
- Had + Flown ✅
- Has + Flew ❌
- Have + Flew ❌
A simple memory trick:
Has always needs the past participle.
Quick Tips for Writing and Speaking
- Memorize irregular verbs.
- Never use flew after has, have, or had.
- Read professionally written English regularly.
- Listen to native speakers.
- Proofread your writing before submitting it.
When to Use Each One
Use “Time Has Flown By”
Use it when:
- talking about memories
- discussing past experiences
- describing how quickly time passed
- writing essays
- giving speeches
- everyday conversations
- storytelling
- business communication
Examples:
- Time has flown by since graduation.
- The semester has flown by.
- Our vacation has flown by.
Use “Time Has Flown By”
Never use it in standard English.
It is considered a grammar mistake.
When NOT to Use Each One
Do Not Use “Time Has Flew By”
Avoid it:
- in exams
- in essays
- in professional emails
- in academic writing
- in presentations
- in business communication
- in published work
Do Not Replace “Flown” With “Flew”
Incorrect:
- The week has flown by.
- My childhood has flown by.
- The years have flown by.
Correct:
- The week has flown by.
- My childhood has flown by.
- The years have flown by.
Which One to Use (Decision Guide)
Use this quick guide.
| Situation | Correct Choice |
| Present perfect | Time has flown by |
| Academic writing | Time has flown by |
| Everyday conversation | Time has flown by |
| Professional email | Time has flown by |
| Grammar test | Time has flown by |
| Standard English | Time has flown by |
Decision Rule:
If the sentence contains has, have, or had, always use flown.
Real-World Practical Examples
Time Has Flown By Examples
These examples demonstrate incorrect usage.
- ❌ Time has flown by since college.
- ❌ The meeting has flown by.
- ❌ My childhood has flown by.
- ❌ This semester has flown by.
- ❌ The holiday has flown by.
Time Has Flown By Examples
- The school year has flown by so quickly.
- Time has flown by while working on this project.
- The vacation has flown by faster than expected.
- Technology has changed so much because time has flown by.
- Our friendship has grown because the years have flown by.
Self-Assessment (Fill in the Blanks)
- I will use ______ when referring to present perfect tense. The correct word is ______ because it follows “has.”
- I will use ______ when describing that years passed quickly. The correct word is ______ because it is grammatically correct.
- I will use ______ after “have.” The correct word is ______ because it is the past participle.
- I will use ______ in an essay. The correct word is ______ because formal writing requires correct grammar.
- I will use ______ in business communication. The correct word is ______ because it follows grammar rules.
- I will use ______ after “had.” The correct word is ______ because past participles follow helping verbs.
- I will use ______ in conversation. The correct word is ______ because it is standard English.
- I will use ______ in an email. The correct word is ______ because it is grammatically accurate.
- I will use ______ when discussing childhood memories. The correct word is ______ because it expresses completed time.
- I will use ______ when talking about vacations. The correct word is ______ because the phrase uses present perfect.
- I will use ______ after “has.” The correct word is ______ because “flew” is incorrect here.
- I will use ______ in academic writing. The correct word is ______ because it follows grammar conventions.
- I will use ______ in a speech. The correct word is ______ because audiences expect standard English.
- I will use ______ when writing professionally. The correct word is ______ because it is accepted English.
- I will use ______ in a grammar test. The correct word is ______ because it is the correct verb form.
- I will use ______ when describing fast-moving years. The correct word is ______ because it is idiomatic.
- I will use ______ after “have.” The correct word is ______ because irregular verbs require the past participle.
- I will use ______ when editing documents. The correct word is ______ because accuracy matters.
- I will use ______ in published writing. The correct word is ______ because it is grammatically correct.
- I will use ______ whenever I see “has.” The correct word is ______ because the present perfect requires flown.
Answers
- Time has flown by
- Time has flown by
- Flown
- Time has flown by
- Time has flown by
- Flown
- Time has flown by
- Time has flown by
- Time has flown by
- Time has flown by
- Flown
- Time has flown by
- Time has flown by
- Time has flown by
- Flown
- Time has flown by
- Flown
- Time has flown by
- Time has flown by
- Flown
Final Verdict
Between “time has flew by” and “time has flown by,” only “time has flown by” is grammatically correct. The confusion comes from the irregular verb fly, whose simple past form is flew and past participle is flown. Because the helping verb has requires a past participle, flown is always the correct choice in the present perfect tense. Whether you’re writing an essay, sending a professional email, having a conversation, or taking an English exam, using “time has flown by” will ensure your grammar is accurate and natural. By remembering the simple rule “has + flown, never has + flew,” you’ll avoid one of the most common mistakes English learners make and communicate with greater confidence.
Conclusion
When comparing Time Has Flew By Or Time Has Flown By, the correct choice is clear: “time has flown by” is the proper grammatical expression, while “time has flew by” is incorrect in standard English. The difference comes from the irregular verb fly, where flew is the simple past tense and flown is the past participle used with helping verbs like has, have, and had.
Understanding this rule helps you avoid one of the most common English grammar mistakes and improves both your writing and speaking skills. Whether you’re preparing for an exam, writing professionally, or simply having a conversation, using “time has flown by” will make your English sound natural and accurate. By remembering the basic verb forms and practicing them regularly, you’ll build greater confidence and communicate more effectively every time you describe how quickly time seems to pass.
FAQs
Is “time has flew by” grammatically correct?
No. “Time has flew by” is grammatically incorrect because flew is the simple past tense. After the helping verb has, English requires the past participle flown, making “time has flown by” the correct expression.
Why is “time has flown by” correct?
The phrase uses the present perfect tense, which follows the pattern has + past participle. Since flown is the past participle of fly, “time has flown by” follows standard English grammar rules.
What is the difference between “flew” and “flown”?
Flew is the simple past form of fly, while flown is the past participle. Use flew without a helping verb and flown after has, have, or had.
Can I use “time flew by” instead?
Yes. “Time flew by” is completely correct because it uses the simple past tense without a helping verb. It describes that time passed quickly during a completed period in the past.
Is “time has flown by” an idiom?
Yes. It is a common English expression that means time seemed to pass very quickly. Although it uses the verb fly, it refers to the speed of passing time rather than actual flying.
When should I use “time has flown by”?
Use it when talking about events or experiences that started in the past and connect to the present. It is common in conversations, essays, speeches, emails, and professional writing.
Why do learners confuse “flew” and “flown”?
Many learners struggle with irregular verbs because their past tense and past participle forms are different. Memorizing the forms fly–flew–flown helps prevent this common grammar mistake.
Is “time has flown by” suitable for formal writing?
Yes. It is appropriate for both formal and informal writing. You can confidently use it in academic papers, business emails, articles, and everyday communication.
How can I remember the correct phrase?
A simple rule is to remember that has, have, and had always need a past participle. Since flown is the past participle of fly, the correct phrase is always “time has flown by.”
Are there similar expressions to “time has flown by”?
Yes. Similar expressions include time passed quickly, the years went by fast, before I knew it, the days slipped away, and time seemed to disappear. All convey the idea that time moved faster than expected.
