Subjunctive vs. Indicative: Making the Choice

One of the most challenging aspects of advanced Spanish is knowing when to use subjunctive versus indicative mood. The choice completely changes the meaning of your sentence.

Core Principle: Indicative describes reality and facts; subjunctive describes possibilities, desires, emotions, and unreality.

In Relative Clauses: Known vs. Unknown

The mood in relative clauses (introduced by que, quien, donde, etc.) depends on whether the antecedent is specific/known (indicative) or non-specific/hypothetical (subjunctive).

Specific/Known Antecedent → Indicative

When you're describing something that definitely exists:

Non-specific/Hypothetical Antecedent → Subjunctive

When you're describing something that may not exist or is purely hypothetical:

The "Any" Test

If you can insert "any" in English, use subjunctive in Spanish:

• Contrata a alguien que sepa programar. (Hire anyone who knows programming.)
• Acepto cualquier trabajo que me ofrezcan. (I'll accept any job they offer me.)

After Conjunctions: Certainty vs. Possibility

Some conjunctions always take subjunctive, others change meaning based on mood.

Always Subjunctive

These conjunctions always require subjunctive because they introduce uncertainty:

Mood Changes Meaning

These conjunctions use indicative for facts and subjunctive for possibilities:

cuando (when)

Indicative (habitual/past facts):

• Cuando tengo tiempo, leo. (When I have time, I read.) [habitual]
• Cuando llegué, ya se había ido. (When I arrived, he had already left.) [past fact]

Subjunctive (future/uncertain):

• Cuando tenga tiempo, te llamaré. (When I have time, I'll call you.) [future]

aunque (although/even if)

Indicative (conceding a fact):

• Aunque llueve, voy a salir. (Although it's raining, I'm going out.) [it IS raining]

Subjunctive (hypothetical):

• Aunque llueva, voy a salir. (Even if it rains, I'm going out.) [it might rain, might not]

mientras (while/as long as)

Indicative (simultaneous actions):

• Mientras estudias, yo cocino. (While you study, I cook.) [both happening now]

Subjunctive (condition):

• Mientras estudies, tendrás mi apoyo. (As long as you study, you'll have my support.) [conditional]

Creer, Pensar, Parecer: Opinion Verbs

These verbs use indicative when affirming and subjunctive when negating or questioning:

Note: In Latin America, questions with creer often use indicative regardless of doubt. In Spain, subjunctive is more common when expressing real doubt.

Tal vez, Quizá(s), Probablemente

Words expressing possibility can take either mood, with subtle differences:

Subjunctive (more doubt):

• Tal vez venga mañana. (Maybe he'll come tomorrow.) [I really don't know]
• Quizás no sea cierto. (Perhaps it's not true.) [expressing doubt]

Indicative (more certainty):

• Tal vez viene mañana. (Maybe he'll come tomorrow.) [I think he will]
• Quizás no es cierto. (Perhaps it's not true.) [I'm fairly sure]

When these words come after the verb, they always take indicative: Viene mañana, tal vez.

The Negation Contrast

Negating existence requires subjunctive:

Practice