What Does โKeep sb inโ Mean?
โKeep sb inโ means to prevent someone from leaving a place, often for safety, health, or control reasons.
Introduction
The phrasal verb โkeep sb inโ is commonly used in English to describe situations where someone is not allowed to leave a location. This can happen for different reasons such as illness, punishment, or protection. Understanding the โkeep sb in meaningโ helps learners use it properly in both formal and informal contexts. It is often used by doctors, teachers, and parents when they want to control or care for someone by keeping them inside or in a specific place.
Quick Info Box
- Phrasal verb: keep somebody in
- Type: transitive
- Level: B1
- Short meaning: to not allow someone to leave a place
Structure (Grammar Rules)
โKeep sb inโ is a transitive phrasal verb. It is separable, meaning the object (somebody) can come between โkeepโ and โinโ or after โin.โ
- Keep somebody in
- Keep in somebody (less common but possible in some contexts)
Examples of correct structure:
- The nurse kept the patient in after the surgery.
- They decided to keep in the children during the storm.
How to Use โKeep sb inโ?
You use โkeep sb inโ when you want to express that someone is being prevented from leaving a place. This is often for reasons like illness, safety, or discipline. It is commonly used in medical, educational, and family settings.
Examples of contexts:
- A doctor keeping a patient in the hospital for observation.
- A teacher keeping a student in the classroom after school as a punishment.
- A parent keeping a child inside during bad weather.
Examples
Imagine a situation where a child is not allowed to go outside because of bad weather. You might say:
- โWe have to keep the kids in until the storm passes.โ
- The doctor decided to keep the patient in overnight for further tests.
- Because of her injury, the coach kept her in during practice.
- They kept him in the office to finish the report.
- The school kept the students in after classes for extra lessons.
Here, โkeep sb in in a sentenceโ shows control or prevention of leaving.
Common Mistakes
Sometimes learners confuse โkeep sb inโ with other similar phrases. Here are some common errors:
- Incorrect: Keep in the children during the storm.
- Correct: Keep the children in during the storm.
- Incorrect: The doctor kept in the patient after surgery.
- Correct: The doctor kept the patient in after surgery.
Remember, the object (sb) usually comes between โkeepโ and โin.โ
Differences / Synonyms
โKeep sb inโ is similar to โconfine sb,โ โdetain sb,โ or โhold sb back,โ but each has a different tone and use.
- Confine sb: Suggests restricting someone to a place, often more formal or legal.
- Detain sb: Usually used by police or authorities to hold someone temporarily.
- Hold sb back: Means to prevent progress or movement but often used metaphorically.
โKeep sb inโ is softer and more common in everyday speech, especially in health or caring contexts.
Common Collocations
Some common objects or nouns used with โkeep sb inโ include:
- Patient: to prevent a patient from leaving a hospital
- Child/children: to keep kids inside for safety
- Student: to keep a student after class as a punishment
- Employee: to keep an employee at work longer
- Guest: to keep guests inside during bad weather
Related Phrasal Verbs
Here are related phrasal verbs of keep sb in:
Real-life Dialogue
Here is a short conversation using โkeep sb inโ:
Mom: The weather looks bad today. We should keep the kids in.
Dad: Good idea. Itโs safer than letting them play outside.
Mom: The doctor said they need to keep him in for another night.
Dad: I hope he feels better soon.
Practice
Choose the correct option to complete the sentence:
They decided to _______ the students _______ after school for extra help.
- a) keep / in
- b) keep in / students
- c) keep / out
Answer: a) keep / in
FAQs
- What does โkeep sb inโ mean? It means to prevent someone from leaving a place.
- Is โkeep sb inโ separable? Yes, the object usually goes between โkeepโ and โin.โ
- Can โkeep sb inโ be used for punishment? Yes, teachers often use it to keep students after class.
- Is โkeep sb inโ formal or informal? It is commonly used in both formal and informal contexts.
- What is a synonym for โkeep sb inโ? Confine or detain can be synonyms depending on context.

