C1 Spanish grammar

Comparison and Proportion Clauses in Spanish

Complex comparison can connect two changing tendencies, compare reality with an imagined scene, or measure a result against an expected standard. Each relationship has its own connector, mood, and reference structure.

Comparison and Proportion Clauses in Spanish decision map

1. Express correlated change in Spanish comparison and proportion clauses → 2. Compare reality with an imagined situation → 3. Identify the standard and degree of comparison

Work through these meaning and discourse decisions in order before choosing the final structure.

Comparison and Proportion Clauses in Spanish: choices and models

DecisionGuidanceModel
Express correlated change in Spanish comparison and proportion clausesUse cuanto más or menos in the first clause and más, menos, mejor, or peor in the second. The definite article agrees with an explicit noun when one appears: cuantos más datos, más precisa.Cuantos más datos analizamos, más precisa resulta la estimación.
Compare reality with an imagined situationComo si always selects a past subjunctive form: use the imperfect subjunctive for a simultaneous or general imagined comparison and the past perfect subjunctive for an imagined event completed earlier.Habla como si conociera el proyecto y reaccionó como si ya hubiera leído el informe.
Identify the standard and degree of comparisonUse de lo que after más or menos when comparing with a full proposition, and como when expressing equality of manner or role. Preserve the preposition required by the adjective or verb inside the comparison.El proceso fue más complejo de lo que habíamos previsto y no funcionó como esperábamos.

The model illustrates the decision; preserve its meaning and discourse effect when adapting it.

Spanish comparison and proportion clauses: Express correlated change in Spanish comparison and proportion clauses

Use cuanto más or menos in the first clause and más, menos, mejor, or peor in the second. The definite article agrees with an explicit noun when one appears: cuantos más datos, más precisa.

Cuantos más datos analizamos, más precisa resulta la estimación.
The more data we analyze, the more precise the estimate becomes.Cuantos agrees with datos, and the two comparative phrases link increases in quantity and precision.

Quick check

Choose the agreeing proportional structure.

Compare reality with an imagined situation

Como si always selects a past subjunctive form: use the imperfect subjunctive for a simultaneous or general imagined comparison and the past perfect subjunctive for an imagined event completed earlier.

Habla como si conociera el proyecto y reaccionó como si ya hubiera leído el informe.
He speaks as if he knew the project and reacted as if he had already read the report.Conociera is simultaneous with habla; hubiera leído is earlier than reaccionó.

Identify the standard and degree of comparison

Use de lo que after más or menos when comparing with a full proposition, and como when expressing equality of manner or role. Preserve the preposition required by the adjective or verb inside the comparison.

El proceso fue más complejo de lo que habíamos previsto y no funcionó como esperábamos.
The process was more complex than we had anticipated and did not work as we expected.De lo que introduces a propositional degree standard; como introduces the expected manner.

Common mistakes

Cuanto más datos analizamos, más precisa es.

Cuantos más datos analizamos, más precisa es la estimación.

Before the explicit plural noun datos, cuanto functions adjectivally and agrees in number.

Habla como si conoce el proyecto.

Habla como si conociera el proyecto.

Como si requires the subjunctive even when the comparison seems plausible.

Fue más complejo que habíamos previsto.

Fue más complejo de lo que habíamos previsto.

A comparison between a degree and a full proposition normally uses de lo que.

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Comparison and proportion clauses FAQ

What does comparison and proportion clauses cover?

Complex comparison can connect two changing tendencies, compare reality with an imagined scene, or measure a result against an expected standard. Each relationship has its own connector, mood, and reference structure.

What is the first rule to remember?

Use cuanto más or menos in the first clause and más, menos, mejor, or peor in the second. The definite article agrees with an explicit noun when one appears: cuantos más datos, más precisa.

What is another important C1 pattern?

Como si always selects a past subjunctive form: use the imperfect subjunctive for a simultaneous or general imagined comparison and the past perfect subjunctive for an imagined event completed earlier.

How can I practise Spanish comparison and proportion clauses?

Complete the focused round, review each correction, and repeat the lesson when its skills become due again.

Continue learning

Advanced time clausesCoordinate immediate succession, duration, and temporal boundaries across complex viewpoints with precise connectors and mood choices.C1 concession clausesExpress free-choice obstacles, reduced concessions, and formally acknowledged counterarguments without repeating the standard aunque contrast.Exception and condition clausesSet exceptions, sufficient conditions, warnings, and counterfactual enabling circumstances with precise connectors and mood.Spanish comparisonsReview más, menos, mejor, and peor before building clausal standards.Spanish imperfect subjunctiveReview the form required for simultaneous comparisons after como si.Spanish past perfect subjunctiveReview the form used for an earlier imagined comparison.