Introduction
Many English speakers learning Spanish get tripped up by connectors that follow words like however and so. Small linking words in English can correspond to several different Spanish connectors, and choosing the wrong one changes meaning or sounds unnatural. This article explains common mistakes and gives clear rules and examples to help you use connectors correctly and confidently.
Why connectors matter
Connectors link ideas, show contrast, cause, consequence, purpose, or sequence. In English, however and so are flexible and often used in many contexts. In Spanish, several different connectors map to the same English word, each with its own nuance and grammatical behavior. Using the right connector improves clarity and makes your Spanish sound natural.
Main Spanish connectors for English however and so
The two English connectors we focus on are however and so. Below are the most common Spanish equivalents and their basic uses.
Equivalents of however
The main Spanish connectors that translate English however include sin embargo, no obstante, pero, and aunque. Each one has a different register and syntactic role.
sin embargo and no obstante
sin embargo and no obstante are formal connectors used at the start or middle of a sentence to introduce contrast. They are often interchangeable and typically followed by a comma when placed at the beginning of a clause.
Examples:
Sin embargo, no vino a la reunión.
No obstante, su opinión fue escuchada.
pero
pero is the most common and neutral connector for contrast. It is used between clauses and does not usually take a comma before it unless the writer wants a pause. Use pero for simple contradictions or to add contrasting information.
Examples:
Quería ir, pero estaba enfermo.
El libro es caro pero interesante.
aunque
aunque is used to introduce a concession, similar to although. It can be followed by indicative or subjunctive depending on whether the action is factual or hypothetical/uncertain. This is a key difference learners often overlook.
Examples:
Aunque hace frío, saldré hoy. (fact)
Aunque haga frío, saldré hoy. (uncertain or speaker views action as potential)
Equivalents of so
English so can mean therefore, consequently, or to such an extent that. Spanish equivalents include así que, por eso, por lo tanto, and entonces. Choosing among them depends on register and sentence structure.
así que
así que is conversational and directly links cause and effect. It commonly appears in spoken Spanish and informal writing.
Examples:
No tenía dinero, así que no fui al concierto.
Llegó tarde, así que perdió la clase.
por eso
por eso emphasizes the reason-result relationship and is also common in speech. It often appears in the main clause and points back to an earlier reason.
Examples:
Está lloviendo; por eso me mojé.
Estudió mucho, por eso aprobó.
por lo tanto and entonces
por lo tanto is more formal, similar to therefore or thus. It is suitable for academic or written registers. entonces often expresses sequence or conclusion and is more neutral; it can mean then or so depending on context.
Examples:
No hay evidencia; por lo tanto, no podemos concluir nada.
No hay pan, entonces compraremos tortillas.
Common mistakes and how to fix them
Now that you know the options, here are typical errors English speakers make when translating however and so, plus clear fixes.
1. Translating however as pero in formal writing
Mistake: Using pero at the beginning of a sentence in a formal text where sin embargo or no obstante would fit better. Spanish formal registers prefer connectors like sin embargo and no obstante.
Fix: Use sin embargo or no obstante to start a contrasting sentence in essays, reports, or formal emails.
Informal: Quería ayudar, pero no pude.
Formal: Quería ayudar. Sin embargo, no pude.
2. Using aunque with the wrong mood
Mistake: Always using the indicative after aunque. This ignores the subtle difference between factual and hypothetical. Use the indicative when stating a fact and the subjunctive when indicating something doubtful, hypothetical, or contrary to expectation.
Fix: Decide whether the clause is presented as fact or speculation.
Fact: Aunque tengo tiempo, no voy. (I do have time.)
Hypothesis or concession: Aunque tuviera tiempo, no iría. (Even if I had time.)
3. Overusing por eso for everything that means so
Mistake: Using por eso for every consequence, including formal conclusions or causal links that require por lo tanto or por consiguiente. This can sound repetitive or imprecise in written Spanish.
Fix: Match register to connector. Use por eso in daily conversation, and por lo tanto or por consiguiente in formal writing.
Informal: No comió, por eso está débil.
Formal: No comió; por lo tanto, su salud empeoró.
4. Literal translation of however as sin embargo inside clauses without punctuation
Mistake: Placing sin embargo in the middle of a clause without setting it off with commas, producing awkward sentences. Sin embargo functions as a parenthetical connector and usually needs punctuation when interrupting a sentence.
Fix: Use commas or reposition the connector. Alternatively, use pero for a seamless connector within a clause.
Awkward: Quería, sin embargo no lo dijo.
Better: Quería, sin embargo, no lo dijo.
Or natural: Quería, pero no lo dijo.
5. Confusing entonces vs así que
Mistake: Using entonces and así que interchangeably without noticing slight meaning differences. Así que implies immediate consequence and is causal; entonces can be temporal or a conclusion marker and does not always imply direct causality.
Fix: Use así que when you want to show cause-result clearly and entonces when you indicate sequence or draw a conclusion from a previous statement.
Causal: No tenía gasolina, así que no llegó.
Sequence/conclusion: Primero estudié, entonces descansé.
Grammar tips: punctuation and word order
Understanding punctuation and placement helps with natural use of connectors.
Commas with connectors
Use a comma after sin embargo and no obstante when they start a clause. If these connectors interrupt a sentence, set them off with commas. With pero, a comma before it is optional and depends on whether you want a pause.
Position of connectors
Connectors like así que and por eso can appear between clauses. Connectors that express concession, like aunque, belong at the start of the subordinate clause. Move connectors slightly if the sentence sounds clumsy.
Mood after connectors
Remember that connectors like aunque require careful attention to mood: indicative for facts, subjunctive for uncertainty or hypothetical situations. This is one of the major grammar differences from English.
Real sentence examples and breakdowns
Below are example sentences with brief explanations to show how connectors change meaning.
No tuve tiempo, por eso no terminé el proyecto.
Explanation: Straight causal relationship. Por eso points to a direct result of the prior clause.
Quería ayudarte. No obstante, pensé que lo hacías mejor solo.
Explanation: Formal contrast. No obstante signals an opposing idea and is suited for written or formal speech.
Aunque sabía la respuesta, no respondió en clase.
Explanation: Factual concession using indicative after aunque.
Aunque supiera la respuesta, no la diría.
Explanation: Hypothetical concession using subjunctive after aunque.
El restaurante cerró temprano; por lo tanto, buscamos otro lugar para cenar.
Explanation: Formal conclusion. Por lo tanto is appropriate here for a logical inference.
No me llamó, así que supuse que estaba ocupado.
Explanation: Conversational cause-result. Así que feels natural in spoken narratives.
Cultural and usage notes
Different Spanish-speaking regions prefer some connectors over others. For example, in many Latin American countries, por eso and así que are extremely common in speech, while European Spanish writing may use sin embargo and por lo tanto more often in formal registers.
Register matters: adjust your connector choice to the situation. In emails to professors or in essays, aim for sin embargo, no obstante, and por lo tanto. In casual conversations or texts with friends, pero, así que, and por eso are safer and sound more natural.
Connecting versus contrasting: some learners overuse contrast connectors. Make sure your connector matches the logical relationship you want to express: contrast, concession, cause, consequence, or sequence.
Quick reference chart
Here is a brief guide to pick the right Spanish connector based on meaning and register.
Contrast (neutral): pero
Contrast (formal): sin embargo, no obstante
Concession: aunque (indicative or subjunctive depending on fact vs hypothetical)
Cause-result (informal): por eso, así que
Cause-result (formal): por lo tanto, por consiguiente
Sequence or conclusion: entonces
Practice advice for learners
To internalize these connectors, notice them in authentic materials: news articles, podcasts, and conversations. Pay attention to punctuation and mood after aunque. Try rewriting English sentences with alternative Spanish connectors to feel the difference in nuance.
When writing, pick a register and stay consistent. If you use formal connectors, keep a more formal tone throughout. When speaking, choose the most natural conversational connector and listen for feedback from native speakers.
Conclusion
English however and so map to several Spanish connectors, each with specific uses, moods, and levels of formality. Master pero, sin embargo, aunque, así que, and por eso first, paying attention to commas and the subjunctive after aunque. With practice and exposure, you will quickly learn to choose the right connector and sound more natural in Spanish.

