Time flies is the correct form. Time flys is incorrect in standard English.
Many people get confused because the verb fly changes to flies in the third-person singular, while the plural noun flies is also the name of insects. The two words look the same but have different meanings depending on the sentence.
In this article, you’ll learn the difference between time flies and time flys, why one is correct, how to use it properly, common mistakes to avoid, and an easy trick to remember.
Quick Answer
The correct phrase is time flies.
The verb fly becomes flies when the subject is time because time is a singular noun.
Examples:
- ✅ Time flies when you’re having fun.
- ❌ Time flys when you’re having fun.
Time Flies vs Time Flys: Main Difference
| Word/Phrase | Meaning | Correct? | Best Used For | Example |
| Time flies | Time seems to pass quickly | ✅ Yes | All writing and speech | Time flies during vacations. |
| Time flys | Incorrect spelling of the verb | ❌ No | Avoid using it | ❌ Time flys too fast. |
What Does Time Flies Mean?
Time flies means that time seems to pass very quickly, especially when you are busy, happy, or enjoying yourself.
It is a common English expression used in everyday conversation and writing.
Examples
- Time flies when you’re with good friends.
- I can’t believe it’s already Friday. Time flies.
- Time flies during the holidays.
- Once school started, time flies every week.
- Looking back, time flies faster than we expect.
What Does Time Flys Mean?
Time flys is not correct in standard English.
People usually write flys by mistake because they simply add -s to the verb fly. However, English spelling rules require changing y to ies after a consonant.
Correct:
- ✅ Time flies.
Incorrect:
- ❌ Time flys.
The word flys may appear as a rare surname or proper name, but it is not the correct verb form in normal English.
How to Use Time Flies
Use time flies whenever you want to say that time passes quickly.
Simple Rule
When a verb ends in -y after a consonant, change y to ies for third-person singular.
Examples:
- fly → flies
- cry → cries
- try → tries
- carry → carries
Since time is singular:
- ✅ Time flies.
- ❌ Time flys.
More Examples
Correct:
- Time flies during summer vacation.
- Time flies when you’re busy.
- Time flies as children grow up.
Incorrect:
- ❌ Time flys too quickly.
- ❌ Time flys when you’re happy.
Where to Use Time Flies
The phrase time flies is suitable in almost every situation.
School Writing
- Time flies during the school year.
Formal Writing
- As the project progressed, time flies seemed especially true.
Emails
- Time flies since our last meeting.
Everyday Conversation
- Wow, time flies!
Messages
- Can’t believe it’s been a year. Time flies!
Professional Communication
- Time flies when working on exciting projects.
Regional Usage
The phrase time flies is used the same way in:
- American English
- British English
- Canadian English
- Australian English
- Indian English
- Pakistani English
- New Zealand English
There is no regional spelling difference for this phrase.
Why People Get Confused
There are a few common reasons for the confusion.
- The verb fly looks like it should become flys, but English spelling changes it to flies.
- Flies is also the plural of the insect fly, so the word has two different meanings.
- Many people write words by sound rather than spelling.
- Fast typing or autocorrect mistakes can also lead to flys.
Common Mistakes to Avoid
Wrong:
Time flys when you’re having fun.
Correct:
Time flies when you’re having fun.
Explanation: The verb changes from fly to flies.
Wrong:
My vacation flys by quickly.
Correct:
My vacation flies by quickly.
Explanation: Third-person singular verbs ending in -y become -ies.
Wrong:
Time flys so fast these days.
Correct:
Time flies so fast these days.
Explanation: Always use flies with time.
Wrong:
Life flys past.
Correct:
Life flies past.
Explanation: Life is also singular, so the correct verb is flies.
Real-Life Examples
Meeting
- Time flies during productive meetings.
School
- Time flies when we’re learning something interesting.
Travel
- Time flies on a fun vacation.
Work
- Time flies when you’re focused on your work.
Message
- Can’t believe it’s already July. Time flies!
Conversation
- We haven’t met in years. Time really flies.
Booking
- Book early because time flies before the holiday season.
Easy Trick to Remember
Think of these words together:
- fly → flies
- cry → cries
- try → tries
If the verb ends in a consonant plus y, change y to ies.
So remember:
Time flies, never time flys.
Mini Quiz
1. Which phrase is correct?
Answer: Time flies.
2. Is “time flys” correct?
Answer: No.
3. Complete the sentence: Time when you’re busy.
Answer: flies.
4. Which spelling follows English grammar?
Answer: flies.
5. True or False: “Time flys” is standard English.
Answer: False.
6. Which sentence is correct?
A. Time flys fast.
B. Time flies fast.
Answer: B.
Related Confusing Words
- canceled or cancelled
- gray or grey
- its or it’s
- your or you’re
- there or their
- affect or effect
- bear with me or bare with me
- farther or further
FAQs About Time Flies or Flys
Is time flies correct?
Yes. Time flies is the correct phrase in English.
Is time flys correct?
No. It is an incorrect spelling of the verb.
What is the difference between time flies and time flys?
Time flies is grammatically correct. Time flys is not standard English.
Which one should I use?
Always use time flies.
Is time flies formal or informal?
It works in both formal and informal writing and conversation.
Conclusion
The correct phrase is time flies. The form time flys is incorrect in standard English. The verb fly changes to flies because time is a singular subject. Whether you’re writing an email, speaking with friends, or completing schoolwork, always choose time flies.
Ava Collins