Cool MateAt vs Upon
When to use each in English, with meaning, register, and examples.
At
High-frequency chunkA1preposition
Upon
FormalBeyond 10,000 (less common)B1preposition
Most formal: UponMost common: At
| At | Upon | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ət//æt/","/æt/"]/🇺🇸 /["/ət//æt/","/æt/"]/ | 🇬🇧 /["/əˈpɒn/"]/🇺🇸 /["/əˈpɑːn/"]/ |
| Meaning | A preposition used to show a point in space or time. | on or at a particular time or place |
| Example | She is waiting at the bus stop. | mile upon mile of dusty road |
| Register | Neutral | Formal |
| How common | High-frequency chunk | Beyond 10,000 (less common) |
| CEFR level | A1 | B1 |
| Part of speech | preposition | preposition |
| Collocations | at home, at work, at the station, at night, at a party | upon arrival, upon request, upon reflection, upon hearing, upon completion |
| Antonyms | away, out | after, below, underneath |
| Common mistakes | Confused with 'in' when referring to specific locations., Used 'at' when it should be 'on' for days., Incorrectly used 'at' for general areas instead of specific points. | Confused with 'on' in casual speech., Used inappropriately in informal settings., Misunderstood as a preposition that can replace any instance of 'on'. |
| Usage notes | Use 'at' for specific locations or times. Avoid using it for broad areas (use 'in') or for days (use 'on'). | Used in more formal contexts, often in writing. Not commonly used in everyday spoken English. Avoid in casual conversations. |
Frequently asked questions: At vs Upon
What's the difference between At and Upon?
At: A preposition used to show a point in space or time. Upon: on or at a particular time or place
Which is more formal: At and Upon?
Upon is the most formal of these.
Which is more common: At and Upon?
At is the most common in everyday English.
Are At and Upon the same CEFR level?
At: A1, Upon: B1 on the CEFR scale.
Can I use At and Upon interchangeably?
Not always. At and Upon are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.