keep an eye on sb Meaning, Examples & How to Use

What Does “keep an eye on sb” Mean?

“Keep an eye on sb” means to watch someone carefully or pay close attention to them, often to make sure they are safe or behaving properly.

Introduction

The phrase “keep an eye on sb” is a common English expression used to describe the act of watching someone closely. It often implies a sense of responsibility or care, such as looking after a child or monitoring a colleague’s work. Understanding the keep an eye on sb meaning helps learners use it naturally in daily conversations. This phrase is informal but widely used in both spoken and written English. By learning how to use it correctly, you can improve your ability to describe situations where you observe or watch someone attentively.

Quick Info Box

• Phrasal verb: keep an eye on somebody
• Type: transitive
• Level: B1 (Intermediate)
• Short meaning: watch someone carefully

Structure (Grammar Rules)

“Keep an eye on sb” is a fixed expression and is inseparable. You cannot split the phrase or move parts of it around. The structure is:

• keep + an eye + on + somebody

For example, you say: Keep an eye on the kids, not Keep the kids an eye on.

How to Use “keep an eye on sb”?

This phrase is used when you want to say that you are watching someone carefully, usually to ensure safety or good behavior. It can be used in both formal and informal situations but is more common in everyday speech. You can use it when talking about children, pets, friends, or even coworkers.

Examples

Imagine you are at a park with your younger sibling. You might say:

• “Can you keep an eye on my brother while I get some water?”
• “I need to keep an eye on the children during the school trip.”
• “Please keep an eye on John; he’s new and might need help.”
• “I always keep an eye on my plants to make sure they don’t dry out.”

These sentences show how “keep an eye on sb” in a sentence fits naturally in different contexts.

Common Mistakes

Sometimes learners confuse the phrase or use it incorrectly. Here are some examples:

• Incorrect: “I keep my eye on him.” (This is grammatically correct but means watching only one eye, which is unusual.)
• Correct: “I keep an eye on him.”
• Incorrect: “Can you keep an eye for the kids?”
• Correct: “Can you keep an eye on the kids?”

Remember, the phrase always includes “an eye” and the preposition “on.”

Differences / Synonyms

There are similar phrases like “watch over sb,” “look after sb,” and “keep tabs on sb.” Each has a slightly different meaning.

• Watch over sb: Usually means to protect someone physically or emotionally.
• Look after sb: Means to take care of someone’s needs.
• Keep tabs on sb: Means to monitor someone’s actions closely, often informally.

“Keep an eye on sb” focuses more on observation rather than active care or protection.

Common Collocations

We often use “keep an eye on” with people or things that need supervision or attention. Here are some common collocations:

• Keep an eye on the children: Watch children carefully.
• Keep an eye on the door: Watch the entrance to notice who comes in or out.
• Keep an eye on the situation: Monitor how things are developing.
• Keep an eye on the time: Be aware of the time passing.

Related Phrasal Verbs

Here are related phrasal verbs of keep an eye on sb:

• Keep Sth On Sth
• Keep Ahead Of Sth
• Keep Sth To Yourself
• Keep On At Sb
• Keep In With Sb

Real-life Dialogue

Here is a short conversation using “keep an eye on sb”:

Emma: Can you keep an eye on my bag while I go to the restroom?

Jack: Sure, I’ll watch it carefully.

Emma: Thanks! I’ll be back in a minute.

Practice

Try to complete the sentences with the correct phrase:

• Can you ________ the kids while I cook dinner?
• It’s important to ________ the door during the event.
• I always ________ my plants to make sure they get enough water.

Answers: keep an eye on

FAQs

• What does “keep an eye on sb” mean?

  It means to watch someone carefully or monitor their actions.
• Is “keep an eye on” formal or informal?

  It is mostly informal but can be used in various situations.

• Can I say “keep an eye for sb”?

  No, the correct preposition is “on,” not “for.”

• Is “keep an eye on” separable?

  No, you cannot separate the phrase.

• What are synonyms for “keep an eye on sb”?

  Some synonyms are “watch over,” “look after,” and “keep tabs on.”