Cool MateKeep an eye on vs Monitor vs Observe vs Supervise
When to use each in English, with meaning, register, and examples.
Keep an eye on
Top 2,000 (common)
Monitor
Top 2,000 (common)B2noun
Observe
Top 1,000 (very common)B2verb
Supervise
Top 2,000 (common)C1verb
Most common: Observe
| Keep an eye on | Monitor | Observe | Supervise | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 //kiːp ən aɪ ɒn//🇺🇸 //kip ən aɪ ɑn// | 🇬🇧 /["/ˈmɒnɪtə(r)/"]/🇺🇸 /["/ˈmɑːnɪtər/"]/ | 🇬🇧 /["/əbˈzɜːv/","/əbˈzɜːvz/","/əbˈzɜːvd/","/əbˈzɜːvɪŋ/"]/🇺🇸 /["/əbˈzɜːrv/","/əbˈzɜːrvz/","/əbˈzɜːrvd/","/əbˈzɜːrvɪŋ/"]/ | 🇬🇧 /["/ˈsuːpəvaɪz/","/ˈsuːpəvaɪzɪz/","/ˈsuːpəvaɪzd/","/ˈsuːpəvaɪzɪŋ/"]/🇺🇸 /["/ˈsuːpərvaɪz/","/ˈsuːpərvaɪzɪz/","/ˈsuːpərvaɪzd/","/ˈsuːpərvaɪzɪŋ/"]/ |
| Meaning | to watch or pay attention to someone or something | A screen used to see pictures or text from a computer. | to watch something carefully | To watch over and manage people or activities. |
| Example | Can you keep an eye on the kids while I cook? | The teacher will monitor the students' progress throughout the semester. | Please observe the changes in the experiment carefully. | to supervise building work |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 2,000 (common) | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | - | B2 | B2 | C1 |
| Part of speech | noun | verb | verb | |
| Collocations | keep an eye on someone, keep an eye on something, keep a close eye on | colour/color, digital, CCTV, on a/the monitor, baby, foetal/fetal, heart, detect something, display something, show something, hooked up to a monitor, UN, ceasefire, election, UN, ceasefire, election | carefully, closely, precisely, be able to, be possible to, be difficult to, among, for, from, be commonly observed, be frequently observed, be widely observed, carefully, closely, precisely, be able to, be possible to, be difficult to, among, for, from, be commonly observed, be frequently observed, be widely observed, astutely, correctly, keenly, to, correctly, faithfully, scrupulously, fail to, failure to observe something | carefully, closely, directly, appoint somebody to, be responsible for supervising something |
| Antonyms | ignore, neglect | ignore, neglect | ignore, neglect, overlook | neglect, ignore |
| Common mistakes | Confusing with 'watch over', which means to protect instead of just monitor., Using in overly formal situations where simpler phrases would work better. | Confused with 'minotor', a common misspelling., Using 'monitor' as a verb without an object, e.g., 'I will monitor' instead of 'I will monitor the situation.' | Confuse with 'abserve' which is not a word., Use 'observed' incorrectly with non-actions, like 'observed the chair'., Forget the preposition when used with 'something' as in 'observe at the sky' instead of 'observe the sky'. | Confused with 'supervisor' - remember 'supervise' is the action, while 'supervisor' is the person., Using 'supervise' in informal contexts where 'help' or 'watch' would be better., Omitting the object - 'supervise' should always have something that is being supervised. |
| Usage notes | Use in contexts where you need to monitor someone or something. More casual than 'observe'. | Use 'monitor' when referring to computer screens or when talking about observing something continuously. More formal contexts may use it to describe supervision or tracking. | Use 'observe' when you are watching something closely or carefully. It is a neutral term suitable for both formal and informal contexts, but it may not be suitable for casual conversations where simpler words like 'watch' may work better. | Used in professional or educational contexts. Avoid using it in casual conversations where simpler terms like 'watch' may be more appropriate. |
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Frequently asked questions: Keep an eye on vs Monitor vs Observe vs Supervise
What's the difference between Keep an eye on, Monitor, Observe, and Supervise?
Keep an eye on: to watch or pay attention to someone or something Monitor: A screen used to see pictures or text from a computer. Observe: to watch something carefully Supervise: To watch over and manage people or activities.
Which is more common: Keep an eye on, Monitor, Observe, and Supervise?
Observe is the most common in everyday English.
Which is more advanced: Keep an eye on, Monitor, Observe, and Supervise?
Supervise is the highest level, at C1, on the CEFR scale.
Can you show an example of each?
Keep an eye on: Can you keep an eye on the kids while I cook? Monitor: The teacher will monitor the students' progress throughout the semester. Observe: Please observe the changes in the experiment carefully. Supervise: to supervise building work
Can I use Keep an eye on, Monitor, Observe, and Supervise interchangeably?
Not always. Keep an eye on, Monitor, Observe, and Supervise 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.