Guía completa para escribir emails formales en el C1 Advanced. Estructura, ejemplos reales y expresiones útiles.

Si te estás preparando para el examen C1 Advanced de Cambridge, sabrás que la parte del Writing puede ser una de las más temidas, pero también una en la que es más fácil asegurar puntos si conoces bien las reglas del juego. En este artículo vamos a centrarnos en una de las opciones más comunes de la Part 2 del Writing de C1: la carta formal (o también email formal).
A diferencia del email informal, donde puedes ser cercano y expresivo, el email o carta formal de C1 requiere distancia, cortesía y un lenguaje sofisticado. Es el tipo de texto que escribirías a un director de empresa, al editor de un periódico o a una institución académica. ¿Listo para dominar este formato? Let’s get on with it!
En el examen C1 Advanced, un email o carta formal es un texto dirigido a una persona o institución con la que no tienes una relación personal cercana. El objetivo suele ser solicitar información, presentar una queja, aplicar para un puesto de trabajo, o responder a un artículo publicado en un medio de comunicación.
A efectos del examen, un email y una carta son exactamente lo mismo. No hay diferencia en el formato ni en el contenido. Cambridge utiliza ambos términos indistintamente en esta parte, así que las reglas que veremos aquí aplican a ambos formatos.
Como ya sabrás, el Writing del CAE tiene dos partes. La Parte 1 es obligatoria (siempre es un essay), pero en la Parte 2 tienes que elegir una tarea de entre tres opciones. Estas opciones pueden incluir: review, report, proposal, formal email/letter o informal email/letter.
Por lo tanto, no siempre aparecerá la opción de carta formal, pero es igual de probable que aparezca que el resto de opciones. Y si aparece, es fundamental que sepas distinguirlo del informal y que apliques el registro adecuado desde la primera palabra.
Para conseguir la máxima puntuación, tu texto debe cumplir con ciertas expectativas de nivel y estilo:
Aunque sea formal, el texto debe estar perfectamente organizado. La claridad es fundamental en este registro. Esta es la estructura ideal:
Vamos a desglosar el proceso para que sepas exactamente qué hacer en el examen:
La teoría está muy bien, pero veamos cómo se aplica en la práctica con un ejemplo original creado específicamente para esta guía.
You have read the following announcement from a local environmental organisation:
«GREEN FUTURE INITIATIVE: We are seeking volunteers to help coordinate our annual environmental awareness campaign in schools across the region. Successful candidates will be responsible for organising workshops, liaising with teachers, and presenting environmental topics to students aged 12-16. We are looking for enthusiastic individuals with strong communication skills and a genuine passion for environmental issues.»
Write a formal letter of application. In your letter you should:
Write your answer in 220 – 260 words in an appropriate style.
En esta tarea, debemos escribir una carta formal de solicitud cubriendo estos tres puntos:
Dear Sir or Madam,
I am writing to express my strong interest in the volunteering position advertised for your annual environmental awareness campaign. As a qualified secondary school teacher with a longstanding commitment to environmental conservation, I believe I would be an ideal candidate for this role.
My interest in this opportunity stems from my conviction that environmental education is crucial for the younger generation. Having witnessed the devastating effects of climate change firsthand during my travels to coastal regions, I am firmly convinced that raising awareness among adolescents is one of the most effective ways to secure a sustainable future. Furthermore, working with schools would allow me to combine my two greatest passions: education and environmental protection.
As regards my qualifications, I have been teaching Science at a local secondary school for the past five years, during which time I have developed strong presentation and communication skills. Additionally, I hold a degree in Environmental Science and have recently completed a postgraduate course in Environmental Policy. I am therefore well-equipped to explain complex environmental issues in an accessible and engaging manner to young audiences.
In terms of specific contributions, I would be particularly keen to develop interactive workshops focusing on practical solutions that students can implement in their daily lives. I could also establish connections with my current school and other educational institutions in the area, thereby expanding the reach of your campaign significantly.
I would be grateful if you could consider my application. Should you require any further information, please do not hesitate to contact me.
I look forward to hearing from you at your earliest convenience.
Yours faithfully,
Catherine Morrison
¿Por qué funciona bien este email formal para el C1? Te lo explico brevemente a continuación:
Para conseguir un registro verdaderamente formal, necesitas dominar ciertos elementos lingüísticos que son característicos de este tipo de escritos:
No escribas «I’m writing» o «I’d like». En emails formales, nunca se utilizan contracciones. Siempre debes escribir la forma completa: «I am writing», «I would like», «do not», «cannot».
Evita también palabras coloquiales como «stuff», «things», «get», «lots of». En su lugar, utiliza vocabulario más preciso y formal.
Una de las características más evidentes del registro formal es la preferencia por verbos de origen latino en lugar de phrasal verbs. Aquí tienes algunos ejemplos de transformación:
| Informal (Phrasal Verb) | Formal (Verbo simple) |
|---|---|
| find out | discover, ascertain |
| put off | postpone, delay |
| set up | establish, arrange |
| look into | investigate, examine |
| go on | continue, proceed |
| show | demonstrate, illustrate |
| get in touch | contact, reach out |
| ask for | request, enquire about |
El registro formal favorece estructuras más complejas. Algunas de las más útiles son:
Los conectores son esenciales para dar coherencia a tu texto. En emails formales, debes usar conectores sofisticados:
Para que tengas más referencias, aquí tienes otros dos ejemplos completos con sus respectivas respuestas modelo, cubriendo diferentes temáticas típicas del examen.
Instrucciones de la tarea:
You recently purchased a high-end laptop from an online retailer for your university studies. However, when the laptop arrived, you discovered that it had several defects: the screen had dead pixels, the battery life was significantly shorter than advertised, and some of the pre-installed software was not functioning properly.
Write a formal letter of complaint to the customer service department. In your letter you should:
Write your answer in 220 – 260 words.
Respuesta modelo:
Dear Sir or Madam,
I am writing to express my profound disappointment with a laptop I purchased from your online store on 15th January 2026 (Order Reference: LP-2026-4873). I regret to inform you that the product delivered was significantly defective and has failed to meet the standards one would expect from such a reputable company.
Upon receiving the laptop, I immediately noticed several serious defects. Firstly, the screen displays multiple dead pixels, which is particularly problematic when working with detailed graphics and documents. Secondly, the battery life is considerably shorter than the eight hours advertised on your website; in reality, it barely lasts three hours. Finally, several pre-installed applications, including the word processing software essential for my coursework, are not functioning properly and crash frequently.
As a postgraduate student conducting research for my dissertation, I rely heavily on having a dependable laptop. These defects have severely disrupted my academic work. I have been unable to complete assignments on time and have missed important deadlines as a result. Furthermore, I have had to resort to using the university library computers, which has proven highly inconvenient given their limited availability.
In light of these circumstances, I would like to request either a full replacement with a functioning device or a complete refund. Additionally, I believe some form of compensation would be appropriate given the considerable inconvenience I have experienced.
I trust you will treat this matter with the urgency it deserves and look forward to receiving your response within seven working days.
Yours faithfully,
Thomas Bennett
Instrucciones de la tarea:
You have read the following extract in a national newspaper:
«Public libraries have become obsolete in the digital age. With unlimited information available online, maintaining physical libraries is an unnecessary expense for local councils. The buildings should be converted into more practical facilities such as community centres or commercial spaces.»
Write a letter to the newspaper editor. In your letter you should:
Write your answer in 220 – 260 words.
Respuesta modelo:
Dear Editor,
I am writing in response to the article published in your newspaper on 20th January regarding the alleged obsolescence of public libraries. I am afraid I must strongly disagree with the assertions made in the piece, as I believe the author has fundamentally misunderstood the role libraries play in contemporary society.
Firstly, whilst it is true that information is readily available online, access to digital resources is far from universal. According to recent statistics, approximately 15% of households in the UK lack reliable internet connectivity. For these individuals, particularly those from disadvantaged backgrounds, libraries provide essential access to information and educational resources. Without them, we would be exacerbating existing social inequalities rather than addressing them.
Moreover, libraries serve functions that extend far beyond merely housing books. They provide quiet spaces for study, which is invaluable for students who may not have suitable environments at home. Furthermore, they offer free computer access, job-seeking support, and literacy programmes for all age groups. Many elderly citizens, for instance, rely on library staff to assist them with digital technology and online government services.
Rather than closing libraries, we should be reimagining them as dynamic community hubs. They could host workshops, cultural events, and provide meeting spaces for local groups. In doing so, they would continue to fulfil their traditional role of democratising knowledge whilst adapting to the needs of modern communities.
I sincerely hope you will consider publishing this alternative perspective on such an important matter.
Yours faithfully,
Dr Eleanor Whitfield
Es vital no confundir estos dos tipos de escritos. Confundir el registro es uno de los errores más graves que puedes cometer en el examen. Si quieres profundizar en el otro tipo de email, echa un vistazo a nuestra guía sobre el email informal. Aquí tienes una comparativa detallada para que no cometas errores de registro:
| Aspecto | Email/Carta Formal (Jefe/Institución) | Email/Carta Informal (Amigo/Familiar) |
|---|---|---|
| Objetivo del tono | Distante, objetivo, cortés y profesional. Buscas informar, solicitar o quejarte de manera educada. | Cercano, emocional, subjetivo y relajado. Buscas conectar y mantener la relación. |
| Saludo Inicial | Dear Mr/Ms [Apellido], Dear Sir or Madam, To whom it may concern | Hi, Hey, Dear [Nombre de pila] |
| Contracciones | Prohibidas: Usar siempre la forma completa (I am, do not, will not, cannot). | Esenciales: I’m, don’t, won’t, can’t, it’s. |
| Vocabulario y Verbos | Preferencia por verbos de origen latino y vocabulario sofisticado (enquire, ascertain, establish, contact, request). | Uso frecuente de Phrasal Verbs (find out, set up, get in touch, ask for) y palabras coloquiales. |
| Estructuras Gramaticales | Voz pasiva (para ser impersonal), frases complejas y largas, preguntas indirectas (I wonder if you could…). | Voz activa, frases más cortas, preguntas directas (Can you…?), exclamaciones (!). |
| Conectores | Furthermore, Moreover, However, Nevertheless, Consequently, Therefore. | Anyway, Besides, Plus, So, But. |
| Expresiones idiomáticas | Se evitan los modismos coloquiales. El lenguaje debe ser literal, preciso y objetivo. | Se valora mucho el uso de Idioms (over the moon, give a hand, keep in touch). |
| Nivel de Personalización | Impersonal. Evitas hablar demasiado de ti mismo. Te centras en el tema o problema. | Personal. Hablas de tus experiencias, emociones y opiniones libremente. |
| Despedida | Yours faithfully (si no sabes el nombre), Yours sincerely (si lo sabes). | Best wishes, Take care, Hugs, All the best, Lots of love. |
Nota importante sobre ejemplos de transformación: Fíjate cómo cambia completamente el tono según el registro:
Ejemplo de transformación informal → formal:
| Informal | Formal |
|---|---|
| Hi John! | Dear Mr Thompson, |
| I’m writing because I want to know more about the job. | I am writing to enquire about the position advertised. |
| I’d really love to get this job! | I would be extremely interested in securing this position. |
| Can you tell me when I’ll hear back? | I would be grateful if you could inform me of your decision timeframe. |
| Looking forward to hearing from you soon! | I look forward to hearing from you at your earliest convenience. |
| Cheers, Sarah | Yours sincerely, Sarah Mitchell |
Antes de dar tu email por terminado, pásalo por este filtro. Hemos adaptado la lista de verificación oficial de Cambridge para el C1 específicamente para la tarea de Carta Formal. Si marcas todas las casillas, tu aprobado está mucho más cerca.
¿Quieres asegurarte el aprobado en el Writing del C1? Si te ha gustado esta explicación, te encantará mi guía completa para el Writing del C1: Writing C1: The Ultimate CAE Writing Guide for C1 Cambridge. Se trata del mejor recurso que encontrarás a la venta con ejemplos de todos los tipos de textos, listas de vocabulario avanzado, ejercicios de corrección de errores y plantillas paso a paso para que no tengas que improvisar el día del examen. Es la herramienta que usan miles de personas para triunfar en el Writing del C1 Advanced.
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Espero que esta guía te haya resultado útil para saber cómo escribir una carta formal o un email formal. Recuerda que puedes descargar este artículo en PDF haciendo clic en el botón de la parte superior de la página para repasarlo cuando quieras.
Y hasta el próximo artículo, don’t forget to keep smiling!