A sentence is structurally ambiguous when the same words permit more than one grammatical grouping. The problem is not that a word has two dictionary meanings; it is that a phrase can attach in two places, a coordinator can take different scopes, or a pronoun can have two plausible antecedents.
Context often selects the intended reading in conversation. In contracts, instructions, news, and academic prose, however, the writer should not make the reader guess. The reliable repair is to change the structure—not merely to add commas and hope.
Attachment: what does the phrase modify?
Prepositional phrases and adverbs can attach to a noun phrase or to the verb phrase:
Vaig fotografiar la biòloga amb el telescopi.
I photographed the biologist with the telescope. / I used the telescope to photograph the biologist.
Two bracketings are available:
- [vaig fotografiar [la biòloga amb el telescopi]]: the biologist had the telescope;
- [[vaig fotografiar la biòloga] amb el telescopi]: the telescope was my instrument.
Catalan, like English, does not encode this distinction in the preposition itself. Reordering or lexical expansion makes the relation visible:
Amb el telescopi, vaig fotografiar la biòloga que era al penya-segat.
Using the telescope, I photographed the biologist who was on the cliff.
Vaig fotografiar la biòloga que duia el telescopi.
I photographed the biologist who was carrying the telescope.
The initial amb el telescopi is an instrumental adjunct, not the subject. The subject remains unexpressed first-person singular, identified by vaig. Never infer grammatical function from first position alone.
Attachment also affects adverbs:
La portaveu va anunciar que dimitiria dilluns.
The spokesperson announced on Monday that she would resign. / The spokesperson announced that she would resign on Monday.
Write Dilluns, la portaveu va anunciar... for announcement time, or ...que dimitiria dilluns vinent for resignation time. A comma after dilluns can mark the first reading, but position does most of the disambiguating work.
Coordination and the reach of shared material
Coordination creates ambiguity when a modifier can apply only to the nearest item or to the entire coordinated phrase.
Busquem professores i investigadors amb experiència internacional.
We are looking for female teachers and researchers with international experience. (Does the experience requirement apply to both groups?)
The phrase amb experiència internacional may modify only investigadors or the whole coordination. If both groups need experience, repeat or restructure:
Busquem professores amb experiència internacional i investigadors que també en tinguin.
We are looking for female teachers with international experience and researchers who also have it.
If only the researchers need it, make the contrast explicit:
Busquem professores, i també investigadors que tinguin experiència internacional.
We are looking for female teachers, as well as researchers who have international experience.
The resumptive en in també en tinguin refers to experiència internacional. Omitting it—que també tinguin—would leave tenir without its intended complement in standard Catalan.
Coordinators themselves have scope. Compare [no [A i B]], meaning neither joint option is true, with [[no A] i B], where only A is negated. In real prose, avoid asking no to carry such a burden:
L'empresa no subvencionarà el transport ni pagarà l'allotjament.
The company will neither subsidize transport nor pay for accommodation.
The paired no... ni... explicitly gives negation scope over both predicates. See negation scope for further contrasts.
Pronoun reference is structural and pragmatic
Catalan omits subjects when agreement and context identify them. That economy becomes risky when two same-person referents are active:
Quan la Núria va telefonar a la Sílvia, estava sortint de la reunió.
When Núria phoned Sílvia, she was leaving the meeting. (Núria or Sílvia?)
Adding ella does not necessarily solve the problem: both women match feminine singular. Name the intended participant or recast the clause:
Quan la Núria va telefonar a la Sílvia, la Núria sortia de la reunió.
When Núria phoned Sílvia, Núria was leaving the meeting.
La Núria va telefonar a la Sílvia just quan aquesta sortia de la reunió.
Núria phoned Sílvia just as the latter was leaving the meeting. (formal)
The demonstrative use of aquesta for a person is (formal) and can sound distancing in conversation. Repeating the name is often the most natural solution.
Possessives also need explicit owners when two antecedents compete:
En Pol va parlar amb l'Arnau del seu projecte.
Pol spoke with Arnau about his project. (Whose project?)
Use del projecte d'en Pol or del projecte de l'Arnau. English his is just as ambiguous here, so literal translation does not provide a solution.
Relative-clause reach
A relative clause normally attaches to the nearest compatible noun phrase, but semantics and punctuation can invite a wider reading:
Han restaurat els balcons i les finestres que donaven al pati.
They have restored the balconies and the windows that faced the courtyard. (Did both face the courtyard, or only the windows?)
Because que donaven is plural, it can describe les finestres alone or the combined els balcons i les finestres. To make the wide reading explicit, repeat a determiner phrase:
Han restaurat tant els balcons que donaven al pati com les finestres que hi donaven.
They restored both the balconies that faced the courtyard and the windows that faced it.
For the narrow reading:
Han restaurat els balcons i, de les finestres, només les que donaven al pati.
They restored the balconies and, among the windows, only those that faced the courtyard.
The locative clitic hi resumes al pati. This is not ornamental: it preserves the selected locative relation of donar in the sense “face/open onto.”
Restrictive and nonrestrictive relatives differ in both meaning and punctuation. Els alumnes que havien acabat van sortir selects a subset; Els alumnes, que havien acabat, van sortir presents all the students as having finished. Commas mark the construction, but they do not determine which real-world claim is true.
Punctuation has limits
A comma can signal a boundary or parenthetical reading, and a semicolon can display two balanced clauses. Neither mark can invent a missing complement, decide an unclear antecedent, or correct impossible agreement.
❌ La gerent va informar els proveïdors, que l'enviament s'ajornaria.
Incorrect — the comma does not license the content clause after 'informar els proveïdors'.
✅ La gerent va informar els proveïdors que l'enviament s'ajornaria.
The manager informed the suppliers that the shipment would be postponed.
If que l'enviament s'ajornaria were intended as a relative clause, it would need an antecedent whose role inside the clause is recoverable; els proveïdors cannot play any role in “the shipment would be postponed.”
Neutral and reordered versions
Start with a neutral SVO sentence:
L'ajuntament presentarà el projecte als veïns demà al vespre.
The town council will present the project to the residents tomorrow evening.
Fronting creates distinct information structures:
Als veïns, l'ajuntament els presentarà el projecte demà al vespre.
As for the residents, the town council will present the project to them tomorrow evening.
The initial phrase is an indirect-object topic, resumed by els. Without els, this would be an ill-formed topic dislocation in the standard language. By contrast, ALS VEÏNS presentarà el projecte, no pas als promotors is contrastive focus and rejects the resumptive clitic. Word order alone does not name the construction; intonation, clitic resumption, and discourse status do.
A natural clarification dialogue
—Has dit que visitaríem la fàbrica amb la directora. Vols dir que vindrà amb nosaltres o que és la fàbrica que té directora? —Que vindrà amb nosaltres. Millor escric: «Amb la directora, visitarem la fàbrica nova».
—You said we'd visit the factory with the director. Do you mean she'll come with us, or that it's the factory that has a director? —She'll come with us. I'd better write: 'Together with the director, we'll visit the new factory.'
The speakers diagnose a PP-attachment ambiguity and repair it by moving the companion phrase away from the noun it could modify. Conversation can settle the intended meaning; edited prose should ideally settle it before the conversation is needed.
A step-by-step ambiguity diagnosis
Consider:
La inspectora va revisar l'informe del laboratori que havia detectat l'error.
The inspector reviewed the report from the laboratory that had detected the error. (What detected the error: the laboratory or the report?)
- Find the ambiguous constituent: que havia detectat l'error.
- List compatible antecedents: l'informe and el laboratori are both singular masculine.
- Test the meanings: an institution can detect an error; a report can reveal one, though detectar personifies it slightly.
- Repair by naming the role: l'informe que el laboratori havia elaborat després de detectar l'error if the laboratory detected it, or l'informe del laboratori; el document revelava l'error if the report did.
This diagnosis uses agreement, semantics, and constituent structure together. An English-like preference for the closest noun is only a tendency, never proof.
Common Mistakes
❌ Vaig veure el tècnic amb una càmera, així que queda clar qui la feia servir.
Incorrect reasoning — the final prepositional phrase can attach to the technician or to the seeing event.
✅ Amb una càmera, vaig enregistrar el tècnic mentre reparava l'antena.
Using a camera, I recorded the technician while he was repairing the antenna.
❌ La Irene va escriure a la Berta quan ella arribava, i 'ella' elimina l'ambigüitat.
Incorrect — both possible antecedents match 'ella'.
✅ La Irene va escriure a la Berta quan la Berta arribava a l'estació.
Irene wrote to Berta when Berta was arriving at the station.
❌ Als candidats, entrevistarem divendres.
Incorrect as neutral topic dislocation — the fronted object lacks the required resumptive clitic.
✅ Als candidats, els entrevistarem divendres.
As for the candidates, we'll interview them on Friday.
❌ Per evitar qualsevol dubte, afegim una coma a una frase amb dos antecedents possibles.
Incorrect strategy — punctuation alone does not select a pronoun's antecedent.
✅ Per evitar qualsevol dubte, repetim el nom de la persona a qui ens referim.
To avoid any doubt, we repeat the name of the person we mean.
Key Takeaways
- Draw the competing constituent groupings before trying to repair an ambiguous sentence.
- Use reordering, repetition, lexical precision, and clitic resumption to encode the intended relation.
- Do not assume that the first phrase is a subject or that the closest noun is always a relative's antecedent.
- Punctuation displays structure; it cannot replace missing syntax or decide reference by itself.
- In high-stakes prose, prefer a slightly longer sentence with one reading over an elegant sentence with two.
Now practice Catalan
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Start learning Catalan →Related Topics
- Relative ClausesB2 — Distinguish restrictive and nonrestrictive Catalan relative clauses and choose que, què, qui, on, or el qual with accurate punctuation and register.
- Coordinating ClausesB1 — Link equal clauses with additive, alternative, adversative, and explanatory relations while controlling punctuation, ellipsis, and scope.
- Parenthetical and Reporting ClausesB2 — Use mobile comments such as crec, diu, és clar, and segons sembla to attribute information and calibrate a speaker's commitment.
- Scope and Quantifier InterpretationC1 — Learn how Catalan word order, negation, modals, quantifiers, and focus particles determine which part of a sentence has semantic scope.
- Anaphora and BindingC1 — Track Catalan reflexive, reciprocal, pronominal, and possessive reference through local syntax and discourse viewpoint.