B1 Prepositions 11 min read Medio

Encontrarse por sorpresa (Run into)

Usa 'run into' cuando te encuentras con personas o problemas de forma unplanned y sudden. ¡Es todo sobre la surprise!

Grammar Rule in 30 Seconds

Use 'run into' when you meet someone you know unexpectedly without having planned it beforehand.

  • Always use 'run into' + [person] (e.g., 'I ran into Tom').
  • Never separate the verb: 'run Tom into' is incorrect.
  • It implies a surprise; don't use it for planned meetings.
🏃‍♂️ + ➡️ + 👤 = 😲 'Run into someone'

Overview

### Overview
¿Alguna vez te ha pasado que entras a una cafetería a comprar un café y, de repente, te encuentras cara a cara con alguien que no veías hace años? En español, solemos decir me encontré con o me topé con alguien. En inglés, para expresar ese encuentro fortuito, utilizamos el *phrasal verb* run into.
Este tipo de verbos son fundamentales para sonar como un hablante nativo, ya que le dan a tu discurso esa chispa de naturalidad que a menudo falta en los libros de texto tradicionales.
La gramática inglesa, a diferencia de la española, es menos flexible en cuanto a la estructura de la oración, pero nos ofrece estas pequeñas joyas llamadas *phrasal verbs*. Un phrasal verb es, esencialmente, la combinación de un verbo (en este caso, run) y una preposición o adverbio (into) que, juntos, adquieren un significado nuevo. Mientras que en español usamos verbos simples como encontrar o topar, el inglés prefiere estas construcciones dinámicas.
Es vital entender que run into no se trata de correr físicamente hacia alguien, sino de la sorpresa del encuentro. Como hispanohablantes, a veces traducimos literalmente y cometemos el error de decir cosas como
I ran with someone
, lo cual suena extraño. Dominar run into te permitirá describir situaciones cotidianas —desde una charla casual en la universidad hasta un problema técnico inesperado en el trabajo— con mucha más precisión y fluidez.
Es una herramienta de nivel B1 que marca la diferencia entre hablar un inglés 'de manual' y hablar un inglés real, el que escucharías en una serie de Netflix o en una conversación en un bar.
### How This Grammar Works
Para entender cómo funciona run into, debemos compararlo con nuestro sistema verbal. En español, el verbo encontrar es un verbo transitivo directo:
Encontré a mi amigo
. En inglés, el verbo meet a menudo implica una planificación previa o una presentación formal.
Aquí es donde entra run into. Este *phrasal verb* actúa como un verbo compuesto. La estructura gramatical es idéntica a la de cualquier otro verbo en inglés: el verbo run es el que se conjuga según el tiempo verbal y la persona, mientras que la partícula into permanece invariable.
### Formation Pattern
| Tiempo Verbal | Estructura | Ejemplo |
|---|---|---|
| Present Simple | Subject + run/runs + into + object | I run into my neighbor every day. |
| Past Simple | Subject + ran + into + object | She ran into her boss at the mall. |
| Present Continuous | Subject + am/is/are + running + into + object | We are running into some issues. |
| Present Perfect | Subject + have/has + run + into + object | They have run into bad luck lately. |
Como puedes ver en la tabla, el verbo run sigue las reglas de los verbos irregulares. En pasado simple, cambia a ran, y en participio pasado, vuelve a ser run. Es fundamental no confundir la conjugación del verbo con la preposición into, que siempre debe ir junta.
Un error común es intentar separar el verbo de la preposición, pero en este caso, el significado depende de que ambos elementos estén unidos.
### When To Use It
Usamos run into principalmente en tres contextos:
  1. 1Encuentros inesperados con personas: Cuando ves a alguien por azar, sin haber quedado previamente. Ejemplo:
    I ran into my old teacher at the supermarket
    .
  2. 2Encontrar problemas o dificultades: Es muy común en entornos laborales o académicos. Si el código de tu programa no funciona, puedes decir:
    I ran into a problem with the software
    .
  3. 3Descubrimientos accidentales: Cuando encuentras algo por casualidad. Ejemplo:
    While cleaning my room, I ran into some old photos
    .
Es importante notar que el tono es mayormente informal. No usarías run into en un contexto muy solemne, como una reunión diplomática, donde preferirías usar verbos como encounter o meet.
### Common Mistakes
  1. 1La interferencia del español (Traducción literal): Muchos estudiantes dicen
    I ran with my friend
    . En inglés, run with significa correr físicamente al lado de alguien. La preposición correcta es siempre into.
  2. 2Confundir run into con meet: Meet implica planificación. Si dices
    I ran into my doctor yesterday
    , significa que fue una sorpresa. Si dices
    I met my doctor
    , se entiende que tenías una cita médica. El error común es usar run into para eventos planeados, lo cual suena contradictorio.
  3. 3Uso en contextos formales: Usar run into en un correo electrónico muy serio a un jefe puede sonar demasiado casual. Es mejor usar encounter si quieres mantener un nivel de formalidad elevado.
### Contrast With Similar Patterns
| Verbo | Significado | Contexto |
|---|---|---|
| Run into | Encontrarse por azar (personas/problemas) | Informal / Casual |
| Bump into | Chocar físicamente o encuentro azaroso | Muy informal |
| Come across | Encontrar algo (objeto/información) | Neutral |
| Meet | Encontrarse (planificado o presentación) | Neutral / Formal |
### Quick FAQ
  1. 1¿Puedo usar run into con objetos? Sí, es muy común.
    I ran into a wall
    (literalmente) o
    I ran into a great article online
    (figurativamente).
  2. 2¿Es run into siempre un accidente? Sí, la idea principal es la falta de planificación o la sorpresa.
  3. 3¿Qué hago si quiero sonar más formal? Sustituye run into por encounter o experience cuando hables de problemas o situaciones difíciles.

Conjugating 'Run Into'

Tense Subject Form Example
Present Simple
I/You/We/They
run into
I often run into him.
Present Simple
He/She/It
runs into
She runs into her friends.
Past Simple
All subjects
ran into
We ran into them yesterday.
Present Continuous
All subjects
am/is/are running into
I'm always running into her!
Present Perfect
All subjects
have/has run into
I have run into him twice.
Future (Will)
All subjects
will run into
You will run into her later.

Meanings

To meet someone by chance or unexpectedly while in a public place or during daily activities.

1

Unexpected Meeting

To encounter a person you know without an appointment.

“Guess who I ran into at the gym?”

“I hope I don't run into my ex at this party.”

2

Experience Problems

To start to experience difficulties or opposition.

“The project ran into some technical hitches.”

“We've run into a bit of a problem with the budget.”

3

Physical Collision

To accidentally hit something or someone while moving, usually in a vehicle.

“The bus ran into a lamp post.”

“I almost ran into a cyclist because I didn't see him.”

4

Total Amount

To reach a specific (usually large) number or amount.

“The cost of the repairs will run into thousands of dollars.”

“The number of applications has run into the hundreds.”

Reference Table

Reference table for Encontrarse por sorpresa (Run into)
Escenario de Uso Ejemplo ¿Por qué `Run Into`? Alternativa (si es planeado)
Encontrarse con una persona sin esperarlo
I `ran into` my old boss at the airport.
El encuentro fue por casualidad.
I `met` my old boss for lunch.
Encontrar problemas inesperados
We `ran into` a bug during testing.
El problema apareció de repente.
We *addressed* a known bug.
Descubrir algo por casualidad
She `ran into` a rare book at the market.
El hallazgo fue accidental.
She *looked for* a rare book.
Encuentro social casual
Guess who I `ran into` at the grocery store?
Informal, espontáneo.
Who did you *meet* for coffee?
Experimentar dificultades
The project `ran into` some delays.
Las dificultades surgieron de forma inesperada.
The project *faced* planned delays.

Espectro de formalidad

Formal
I encountered a former colleague by chance.

I encountered a former colleague by chance. (Professional/Social)

Neutral
I ran into an old coworker.

I ran into an old coworker. (Professional/Social)

Informal
I bumped into a guy I used to work with.

I bumped into a guy I used to work with. (Professional/Social)

Jerga
I caught my old work mate out and about.

I caught my old work mate out and about. (Professional/Social)

Ejemplos por nivel

1

I ran into my friend at the shop.

Me encontré con mi amigo en la tienda.

2

Did you run into Tom today?

¿Te encontraste con Tom hoy?

3

I did not run into anyone.

No me encontré con nadie.

4

She ran into her mom at the park.

Ella se encontró con su mamá en el parque.

1

I ran into an old classmate yesterday.

Me encontré con un antiguo compañero de clase ayer.

2

We often run into each other at the library.

A menudo nos encontramos en la biblioteca.

3

He ran into a tree with his bike.

Chocó contra un árbol con su bicicleta.

4

I hope I don't run into my boss here.

Espero no encontrarme con mi jefe aquí.

1

I ran into my former neighbor while I was on vacation in Italy.

Me encontré con mi antiguo vecino mientras estaba de vacaciones en Italia.

2

The company ran into financial trouble last year.

La empresa tuvo problemas financieros el año pasado.

3

If you run into any problems, just give me a call.

Si te encuentras con algún problema, solo llámame.

4

It's a small world; I keep running into people I know.

Es un mundo pequeño; no dejo de encontrarme con gente que conozco.

1

The renovation costs are likely to run into the tens of thousands.

Es probable que los costos de renovación alcancen las decenas de miles.

2

Our proposal ran into a lot of criticism during the meeting.

Nuestra propuesta recibió muchas críticas durante la reunión.

3

I ran into Sarah, of all people, at the most remote café in town.

Me encontré con Sarah, de entre todas las personas, en el café más remoto de la ciudad.

4

The car ran into the barrier, but luckily no one was hurt.

El coche chocó contra la barrera, pero por suerte nadie resultó herido.

1

The project ran into a series of unforeseen logistical hurdles.

El proyecto se topó con una serie de obstáculos logísticos imprevistos.

2

I'm terrified of running into my ex-partner and having to make small talk.

Me aterra encontrarme con mi ex y tener que charlar trivialmente.

3

His debts have run into six figures, which is quite concerning.

Sus deudas han alcanzado las seis cifras, lo cual es bastante preocupante.

4

The new policy ran into stiff opposition from the local community.

La nueva política se topó con una fuerte oposición de la comunidad local.

1

The narrative ran into a bit of a cul-de-sac in the second act.

La narrativa se metió en un callejón sin salida en el segundo acto.

2

Should the negotiations run into a stalemate, we have a contingency plan.

En caso de que las negociaciones lleguen a un punto muerto, tenemos un plan de contingencia.

3

The research ran into a wall when the funding was abruptly cut.

La investigación se topó con un muro cuando se cortó abruptamente la financiación.

4

I happened to run into the CEO in the elevator, which gave me a chance to pitch my idea.

Casualmente me encontré con el CEO en el ascensor, lo que me dio la oportunidad de presentar mi idea.

Fácil de confundir

Meeting by Surprise (Run into) vs Run into vs. Run across

Learners use 'run into' for objects and 'run across' for people.

Meeting by Surprise (Run into) vs Run into vs. Meet up with

Learners use 'run into' for planned social events.

Meeting by Surprise (Run into) vs Run into vs. Bump into

Thinking they have different meanings.

Errores comunes

I ran into with my friend.

I ran into my friend.

Do not use 'with'. 'Into' already covers the connection.

I run into him yesterday.

I ran into him yesterday.

Use the past tense 'ran' for past events.

I ran my friend into.

I ran into my friend.

This phrasal verb is inseparable.

I ran into to him.

I ran into him.

Only one preposition 'into' is needed.

I ran into my boss for a meeting.

I met my boss for a meeting.

'Run into' is only for unplanned events.

I ran into a new person today.

I met a new person today.

Use 'run into' for people you already know.

I was running into him at 5 PM.

I ran into him at 5 PM.

The encounter is usually a single point in time, not a continuous action.

The car ran in a tree.

The car ran into a tree.

The full phrasal verb is 'run into'.

I ran into some problems with my car.

I ran into some problems with my car.

Actually, this is correct, but students often think they can only use it for people.

I ran into him since a long time.

I haven't run into him for a long time.

Incorrect use of 'since' and negative structure.

The costs ran into millions of dollars.

The costs ran into the millions.

While the 'wrong' version is grammatically okay, 'ran into the millions' is more idiomatic for large scales.

Patrones de oraciones

I ran into ___ at the ___.

You won't believe who I ran into: ___!

The project ran into ___ because of ___.

I'm always running into ___ whenever I ___.

Real World Usage

Texting a friend very common

OMG, just ran into your brother at the mall!

Job Interview occasional

In my last role, we ran into some supply chain issues.

Social Media Caption common

Ran into this one at the beach today! ☀️

Travel Stories very common

We ran into a group of hikers who gave us directions.

Police Report occasional

The suspect ran into a parked vehicle while fleeing.

Office Small Talk common

I ran into the CEO in the kitchen; he's actually quite nice.

💡

El Contexto es Clave

Piensa siempre: ¿fue algo planeado o no? 'Run into' es solo para lo inesperado. Si ya lo habías organizado, usa 'meet' en su lugar. Por ejemplo:
I met my friend for coffee.
(porque lo planearon).
⚠️

No para Situaciones Formales

Aunque es muy útil, 'run into' puede sonar demasiado casual en entornos muy formales de negocios o académicos. Es mejor usar palabras como 'encounter' o 'experience'.
We encountered a technical challenge.
(en vez de 'ran into').
🎯

El Mejor Amigo del Solucionador de Problemas

Además de personas, 'run into' es genial para hablar de problemas o desafíos inesperados. Comunica muy bien que surgió un obstáculo de repente. Por ejemplo:
Our project ran into several unforeseen difficulties.
🌍

Para Romper el Hielo

En las culturas de habla inglesa, contar a quién te 'ran into' es una forma común de iniciar una conversación casual o compartir una anécdota reciente. Muestra las conexiones compartidas. Imagina que dices:
Guess who I ran into today?

Smart Tips

Replace 'I met my friend by accident' with 'I ran into my friend'.

I met my friend by accident at the store. I ran into my friend at the store.

Remember that 'into' is a strong preposition that doesn't need a partner.

I ran into with him. I ran into him.

Use 'run into' for the vehicle that was moving and 'hit' for the impact.

The car hit into the wall. The car ran into the wall.

Use 'run into' to emphasize that a price is surprisingly high.

The price was over a thousand dollars. The price ran into the thousands.

Pronunciación

/rʌn ˈɪntuː/

Linking

The 'n' in 'run' links to the 'i' in 'into'. It sounds like 'ru-ninto'.

RUN into

Stress

The primary stress is on 'run'. Do not stress 'into' unless you are emphasizing the direction.

Surprise Intonation

I ran into SARAH! ↗

Conveys excitement and surprise about the encounter.

Memorízalo

Mnemotecnia

Think of 'Running' fast and 'Into' a person—you didn't see them coming!

Asociación visual

Imagine you are jogging in a park and you literally collide with a friend holding a giant 'SURPRISE' sign. This helps you remember it's for unplanned meetings.

Rhyme

Out for a spin, a friend walks in—I ran into them with a grin!

Story

I was at the mall to buy shoes. Suddenly, I saw my old boss near the fountain. I didn't want to see him, but I ran into him anyway. We talked for five minutes, and then I left.

Word Web

UnexpectedSurpriseEncounterChanceInseparableBump intoCoincidence

Desafío

Go for a walk or to a public place. If you see someone you know, tell yourself: 'I just ran into [Name].' If you don't see anyone, imagine who you *might* run into.

Notas culturales

Running into someone usually requires a short 'small talk' session (2-5 minutes). It is considered slightly rude to just say 'Hi' and keep walking without a brief explanation of why you are there.

'Bump into' is often preferred over 'run into' in casual British English, though both are understood.

'Run into' is the dominant form. Americans might use 'ran into' even if they only saw the person from a distance but didn't speak.

The phrase combines the verb 'run' (from Old English 'rinnan') and the preposition 'into'.

Inicios de conversación

Who was the last person you ran into unexpectedly?

Have you ever run into a celebrity in real life?

What would you do if you ran into your ex-partner today?

Tell me about a time a project you worked on ran into difficulties.

Temas para diario

Write about a surprise encounter you had recently. Who did you run into and what did you talk about?
Describe a 'small world' moment where you ran into someone in a very strange or distant place.
Discuss the pros and cons of running into people you know when you are in a hurry.
Analyze a time when a plan of yours ran into unexpected opposition. How did you handle the conflict?

Errores comunes

Incorrect

Correcto


Incorrect

Correcto


Incorrect

Correcto


Incorrect

Correcto

Test Yourself

Elige la forma correcta del 'phrasal verb'.

I ___ my old math teacher at the grocery store last night.

✓ Correct! ✗ Not quite. Correct answer: ran into
Como la acción ocurrió 'last night' (anoche), necesitamos el pasado simple de 'run into', que es 'ran into'.
Encuentra y corrige el error en la oración. Error Correction

Find and fix the mistake:

We are meeting into some serious budget problems with the new project.

✓ Correct! ✗ Not quite. Correct answer: We are running into some serious budget problems with the new project.
'Meeting into' no es un 'phrasal verb' correcto. Para expresar que te encuentras con problemas inesperados, 'running into' es la forma correcta.
¿Qué oración usa 'run into' correctamente? Opción múltiple

Elige la oración correcta:

✓ Correct! ✗ Not quite. Correct answer: They ran into their friends unexpectedly at the park.
'Run into' implica un encuentro inesperado y accidental. Las otras opciones describen reuniones planeadas.

Score: /3

Ejercicios de practica

8 exercises
Fill in the correct form of 'run into'.

Yesterday, I ___ my old boss at the train station.

✓ Correct! ✗ Not quite. Correct answer: ran into
The sentence refers to 'yesterday', so the past tense 'ran' is required.
Which sentence is grammatically correct? Opción múltiple

Choose the correct option:

✓ Correct! ✗ Not quite. Correct answer: I ran into Sarah at the park.
'Run into' is inseparable and does not take the word 'with'.
Find the mistake in this sentence. Error Correction

Find and fix the mistake:

We are going to run into for coffee tomorrow at 10 AM.

✓ Correct! ✗ Not quite. Correct answer: run into
You cannot 'run into' someone for a planned meeting. Use 'meet' instead.
Rewrite the sentence using 'run into'. Sentence Transformation

I met my cousin by surprise at the mall.

✓ Correct! ✗ Not quite. Correct answer: I ran into my cousin at the mall.
'Ran into' replaces 'met by surprise'.
Match the sense of 'run into' with the example. Match Pairs

Match the following:

✓ Correct! ✗ Not quite. Correct answer: Social: I ran into Tom.
All pairs are correctly matched in the options provided.
Complete the dialogue. Dialogue Completion

A: Why were you late? B: I ___ my neighbor and we started talking.

✓ Correct! ✗ Not quite. Correct answer: ran into
'Ran into' explains an unexpected delay caused by a person.
Is the use of 'run into' correct or incorrect? Grammar Sorting

I ran into a bit of trouble with my computer.

✓ Correct! ✗ Not quite. Correct answer: Correct
'Run into' can be used for experiencing problems.
Choose the best meaning for 'run into' in this context: 'The repairs ran into five figures.' Opción múltiple

What does it mean?

✓ Correct! ✗ Not quite. Correct answer: The repairs cost over $10,000.
'Run into' followed by a number means reaching that amount.

Score: /8

Practice Bank

11 exercises
Completa la oración con la forma correcta de 'run into'. Completar huecos

If you ___ any issues installing the software, let me know.

✓ Correct! ✗ Not quite. Correct answer: run into
Identifica y corrige el error. Error Correction

I meet into an old classmate at the festival last weekend.

✓ Correct! ✗ Not quite. Correct answer: I ran into my old classmate at the festival last weekend.
Selecciona la oración donde 'run into' se usa apropiadamente. Opción múltiple

¿Qué oración es correcta?

✓ Correct! ✗ Not quite. Correct answer: We run into a fantastic new restaurant, so we decided to try it.
Traduce la oración a un inglés natural. Traducción

Me encontré con mi dentista en el supermercado.

✓ Correct! ✗ Not quite. Correct answer: ["I ran into my dentist at the supermarket.","I ran into my dentist in the supermarket."]
Pon las palabras en el orden correcto para formar una oración. Sentence Reorder

Ordena estas palabras para formar una oración significativa:

✓ Correct! ✗ Not quite. Correct answer: They ran into serious financial problems.
Empareja el principio de la oración con el final correcto. Match Pairs

Empareja las mitades de la oración:

✓ Correct! ✗ Not quite. Correct answer: matched
Elige la mejor forma verbal para completar la oración. Completar huecos

We were just chatting when we ___ an old friend from high school.

✓ Correct! ✗ Not quite. Correct answer: ran into
Corrige el error en la oración. Error Correction

My phone keeps running with problems after the update.

✓ Correct! ✗ Not quite. Correct answer: My phone keeps running into problems after the update.
Elige la oración que usa 'run into' correctamente. Opción múltiple

¿Qué opción es correcta?

✓ Correct! ✗ Not quite. Correct answer: They often run into interesting historical facts online.
Traduce al inglés. Usa 'run into'. Traducción

Tuvimos dificultades inesperadas con el nuevo diseño.

✓ Correct! ✗ Not quite. Correct answer: ["We ran into unexpected difficulties with the new design.","We ran into unforeseen difficulties with the new design."]
Reordena las palabras para formar una oración coherente. Sentence Reorder

Pon estas palabras en orden:

✓ Correct! ✗ Not quite. Correct answer: I ran into my old friend at a coffee shop.

Score: /11

Preguntas frecuentes (8)

No, you should never use `with`. The correct form is `I ran into him`.

It is neutral. You can use it with friends, but it's also fine in a business meeting to describe a problem.

They are almost the same. `Bump into` is slightly more informal and more common in British English.

No. You only `run into` people you already know. For a first-time meeting, use `meet`.

Use `run` for the present/future and `ran` for the past. Since most surprise meetings are stories, `ran into` is very common.

Yes, but it means a physical collision, like `The car ran into a tree`.

No, it is an inseparable phrasal verb. The object must come after `into`.

It means to start experiencing problems or difficulties.

Scaffolded Practice

1

1

2

2

3

3

4

4

Mastery Progress

Needs Practice

Improving

Strong

Mastered

In Other Languages

Spanish moderate

Encontrarse con / Tropezar con

English does not use 'with' after 'into'.

French moderate

Tomber sur / Rencontrer par hasard

French uses a different verb ('fall') entirely.

German low

Jemandem zufällig begegnen

German doesn't use a phrasal verb structure for this.

Japanese low

偶然会う (Guuzen au)

Japanese relies on an adverb rather than a phrasal verb.

Arabic low

صادف (Saadafa)

Arabic uses a single root verb, not a verb-preposition combo.

Chinese moderate

偶然碰见 (Ǒurán pèngjiàn)

Chinese requires the adverb '偶然' to specify it was by chance.

Learning Path

Prerequisites

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