What Does โRun sth inโ Mean?
โRun sth inโ means to use a new machine or vehicle gently for a period before using it fully. It can also mean to bring someone to the police station.
Introduction
The phrasal verb โRun sth inโ has two main meanings. First, it refers to the process of using a new engine or machine carefully for some time to make sure it works well. This is common with cars or equipment. Second, it is used when someone is taken to the police station for questioning or arrest. Understanding the โRun sth inโ meaning helps you use it correctly in different situations. This guide explains both meanings, grammar, examples, and common mistakes to improve your English skills.
Quick Info Box
- Phrasal verb: Run something in
- Type: Transitive
- Level: B2
- Short meaning: To use a machine gently before full use; to bring someone to the police
Structure (Grammar Rules)
โRun sth inโ is a separable phrasal verb. You can place the object between โrunโ and โinโ or after the entire phrasal verb.
Patterns:
- Run + something + in (e.g., run the engine in)
- Run in + something (e.g., run in the engine)
When the object is a pronoun, it must be placed between the verb and the particle: run it in.
How to Use Run sth in?
Use โrun sth inโ when talking about carefully using new machines or vehicles to improve their performance. For example, when you buy a new car, you run the engine in by driving slowly for the first few hundred miles.
Use it also when describing bringing someone to the police station, often for questioning or arrest.
Examples
Here are some examples of โRun sth inโ in sentences:
- We need to run the new car in before driving it fast.
- The mechanic said to run the engine in gently for 500 miles.
- The police ran him in after the incident last night.
- Make sure to run the machine in carefully to avoid damage.
- They ran the suspect in for questioning about the robbery.
Run sth in in a sentence helps you understand its use in real contexts.
Common Mistakes
Many learners confuse the placement of the object. Here are some common mistakes:
- Incorrect: Run in the engine for 100 miles.
- Correct: Run the engine in for 100 miles.
- Incorrect: They ran in him to the police station.
- Correct: They ran him in to the police station.
Remember, with โrun sth in,โ the object usually comes between โrunโ and โin.โ
Differences / Synonyms
โRun sth inโ is similar to โbreak inโ when talking about machines. However, โbreak inโ is more informal and often used with shoes or animals.
When referring to police action, โrun inโ means to arrest or bring someone in, similar to โtake inโ or โarrest.โ
Common Collocations
Here are common objects used with โrun sth inโ:
- Engine: To use a new engine carefully.
- Car: To drive a new car slowly at first.
- Machine: To test a new machine gently.
- Suspect: To bring someone to the police.
- Person: To take someone into custody.
Related Phrasal Verbs
Here are related phrasal verbs of run sth in:
Real-life Dialogue
Hereโs a short conversation using โrun sth inโ:
Tom: I just bought a new motorbike.
Anna: Great! Remember to run it in slowly for the first few hundred miles.
Tom: Yes, I donโt want to damage the engine.
Anna: Also, the police ran in the suspect yesterday.
Practice
Choose the correct sentence:
- A) You should run in the new engine carefully.
- B) You should run the new engine in carefully.
- C) You should run the new engine on carefully.
Answer: B
FAQ
- What does โrun sth inโ mean? It means to use a new machine gently or to bring someone to the police.
- Can I say โrun in the carโ? No, say โrun the car in.โ
- Is โrun sth inโ formal? It is neutral and used in everyday English.
- Can โrun inโ be used without an object? Yes, but with a different meaning, like โThe dog ran in.โ
- Is โrun sth inโ the same as โbreak inโ? Similar for machines, but โbreak inโ is more informal.
