Levels & career tracks
Curso básico · A1–A2
Nivel A1.1 — IdentidadNivel A1.2 — Rutinas y entornoNivel A2.1 — Contando el mundoNivel A2.2 — Comparando y proyectandoIntermedio · B1–B2
Level B1.1 — Connecting experiencesLevel B1.2 — Narrating and describingLevel B2.1 — ArguingLevel B2.2 — NuanceProfesional / Avanzado · C1–C2
Level C1.1 — PrecisionLevel C1.2 — Register and discourseLevel C2.1 — Style Current levelLevel C2.2 — Native masteryInglés técnico y especialización
Career Track BusinessCareer Track Economics and FinanceCareer Track Business AdministrationCareer Track Information Systems EngineeringCareer Track Educational SciencesCareer Track Medicine and Health SciencesCareer Track Tourism and HospitalityCareer Track Occupational Health and SafetyCareer Track Legal EnglishWelcome to C2! True mastery isn't about knowing more rules — it's about instinctively shifting your language to match the situation: casual with friends, diplomatic with a boss, precise in academic writing. This lesson trains that instinct directly.
Why this matters This lesson connects directly to your progress: it covers informal vs. formal, in daily communication; academic and professional register; register in context. Mastering this content lets you move forward confidently, and reinforces patterns you'll use again later. Take time to review every example before moving to the assessment — repetition is what actually locks knowledge in long-term.
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The goals of this lesson.
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You've now covered C1-level grammar and vocabulary. This lesson teaches register variation — reading a situation and adjusting your English accordingly, a defining C2 skill.
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Compare each pair: the same underlying message, expressed in two completely different registers — one for a friend, one for a formal context.
Examples
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Academic writing favors nominalization, passive constructions, and hedged claims — notice how much more distanced and objective these versions sound.
Examples
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The most advanced skill isn't memorizing forms — it's judging, in real time, which register fits a given audience and purpose.
Examples
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Read the text and answer the questions. You can try as many times as you want.
Dr. Chen switches effortlessly between worlds. In lectures, she speaks with academic precision: "The data suggest a statistically significant correlation between the variables." Minutes later, chatting with students over coffee, she's completely different: "Yeah, the numbers were kind of surprising, honestly."
Her colleagues admire this flexibility. In faculty meetings, she's diplomatic and formal. At home with her kids, she's playful and casual. Linguists call this "code-switching" — and Dr. Chen considers it one of the most underrated skills a fluent speaker can develop.
1. How does Dr. Chen speak in lectures?
2. How does she talk with students over coffee?
3. How is she in faculty meetings?
4. How is she at home with her kids?
5. What do linguists call this flexibility?
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Usa las pistas para completar cada palabra en inglés. Sin calificar — repite las veces que quieras.
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The essentials of this lesson, summarized.
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Key terms to remember.
to cause something to go from one place to another
Neutral, everyday verb used across registers; the surrounding phrasing ("Hey, can you...") is what marks this example as informal, not the verb itself.
Informal (in this context)Collocations: send over, send along, send an email
Synonyms: forward, pass along, dispatch (formal)
feeling or showing thanks
A formal register marker; "I would be grateful if" is a fixed polite formula typical of formal emails and letters, rarely used in speech.
FormalCollocations: would be grateful if, deeply grateful, grateful for
Synonyms: thankful, appreciative, indebted
completely; used informally as an intensifier
A marker of casual, spoken-style register; would be replaced by "entirely" or omitted in formal writing.
InformalCollocations: totally fine, totally agree, totally different
Synonyms: completely, absolutely, entirely (formal)
a plan or agreement about how something will happen
Paired with "entirely acceptable", this phrasing signals a formal register appropriate for business correspondence.
FormalCollocations: entirely acceptable, make arrangements, prior arrangement
Synonyms: agreement, plan, arrangement
used to express regret or apology
A short, casual apology typical of informal speech or chat; contrast with the elaborate formal apology below.
InformalCollocations: sorry about that, so sorry, sorry to bother you
Synonyms: apologies, my bad (very informal)
to say that you are sorry for something
The formal, Latinate equivalent of "sorry"; used in professional writing to express regret with more distance and formality.
FormalCollocations: apologize for, sincerely apologize, must apologize
Synonyms: say sorry, express regret
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Tap the words in the correct order to form the sentence. Ungraded — repeat as many times as you like.
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Tap the correct verb form to complete each sentence. The other options are conjugations from other tenses — on purpose, so you learn to tell them apart.
Sorry I up the numbers on the report
I would grateful if you could forward the relevant documents at your earliest convenience
Management has that this task be completed as soon as possible
Yeah totally fine by me
It's of a big deal to be honest
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Listen to the full dialogue with the speaker buttons first, then fill in the missing words from this lesson's real conversation. Ungraded — repeat as many times as you like.
How should I this to the CEO?
Keep it formal — save the casual tone for to your
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You need at least 80% to unlock the next lesson. You can retake it as many times as you want — your best score is saved.
1. What does this mean: "The boss wants this done ASAP, no excuses."?
2. Which option matches: "Kids these days are always on their phones."?
3. Which option matches: "This development carries substantial implications for the industry."?
4. Choose the equivalent of: "Choosing the right register isn't about correctness — it's about appropriateness for context, audience, and purpose."
5. Choose the equivalent of: "This device represents a noteworthy advancement in the field."
6. Select the correct match for: "This gadget is pretty cool, ngl."
7. Which option matches: "We looked into a range of studies exploring how memory works."?
8. Choose the equivalent of: "Yeah, that's totally fine by me."
9. Which option matches: "Management has requested that this task be completed as soon as possible."?
10. Select the correct match for: "A skilled speaker shifts fluidly between registers depending on who they're addressing."
Review — Lesson 56 What matches: "The implementation of the new policy is scheduled for next month."?
Review — Lesson 56 What matches: "The company's heavy investment in research paid off."?
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You now read situations and adjust your register accordingly. Next lesson: complex syntax typical of advanced formal writing.
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Practice this lesson's vocabulary with a word search and flashcards. Ungraded — play as many times as you like.
Tap the first and last letter of a hidden word to find it. Los términos de varias palabras van sin espacios en el tablero (ej. "give up" aparece como GIVEUP).
Elige la respuesta correcta. Si aciertas, la tarjeta queda lista por hoy; si fallas, vuelve a aparecer pronto para reforzarla. Tu progreso se guarda en este dispositivo.