Subjunctive III: Adjective clauses
Introduction
The subjunctive is used with verbs of uncertainty, desire, doubt, etc. It is also used in adjective clauses. What is an adjective clause, you ask? It is a clause (something with a subject and a verb) that functions as an adjective (so it describes something else). Here are some English examples:
We need people that can speak Spanish. (The underlined clause describes the people we need.)
It’s a steak that comes from organic cows. (Again, the underlined clause tells about the steak.)
She’s looking for someone who owns a car.
The Subjunctive in Adjective Clauses
The trickiest thing about using the subjunctive in adjective clauses is that sometimes it’s required, and sometimes it’s not. The most simple way to think about the difference between adjective clauses that need the subjunctive and those that don’t is to consider whether you are absolutely sure the thing being described exists. Often, this is indicated by the article used before the noun. A definite article (el/la/los/las) indicates that the thing exists; an indefinite article (un/una/unos/unas) indicates that it might not. Consider these two examples:
I need the book that explains how to bake a cake.
I need a book that explains how to bake a cake.
See the difference? In the first, the existence of the book is certain. In the second, it is not. Can you guess which will require the subjunctive? The second:
Necesito el libro que explica cocinar pastel.
Necesito un libro que explique cocinar pastel.
Frequently, you see this kind of thing with the verb buscar:
Ella busca al hombre que repara los coches. (She’s looking for the man who fixes cars.)
Ella busca a un hombre que repare los coches. (She’s looking for a man who fixes cars.)
Adjective clauses are clauses (so they contain a conjugated verb) that are used to describe nouns/pronouns (like adjectives).
Sometimes, their use requires the subjunctive; others, it does not. A general way to tell is to look at the article: a definite article usually indicates that you can use the indicative, while an indefinite article means you need the subjunctive in the adjective clause.
Quick reference:
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Additional Resources:
In your textbook (Realidades III):
1. CapÃtulo 4-1
2. CapÃtulo 7-1
3. CapÃtulo 7-2
4. CapÃtulo 9-1
5. CapÃtulo 9-2