Imperfect Subjunctive in Spanish

The imperfect subjunctive (el pretérito imperfecto de subjuntivo) is a Spanish verb form used to express doubt, emotion, possibility, or hypothetical situations in the past, or in conditional clauses referring to the present. To form the imperfect subjunctive, you must start with the third-person plural form of the preterite tense (e.g., 'hablaron', 'comieron', 'fueron'). You then drop the '-ron' ending and add the appropriate subjunctive endings, which exist in two forms: the '-ra' endings (more common) and the '-se' endings. For example, for 'hablar', 'yo hablara' or 'yo hablase'.

This tense is commonly used in conditional sentences alongside the conditional mood to express hypothetical or counterfactual events. For instance, in the sentence 'If I were rich, I would travel,' 'were' is translated using the imperfect subjunctive: 'Si fuera rico, viajaría'. It is also triggered by verbs of emotion, doubt, or request in the past tense in the main clause. Mastery of this mood is essential for advanced Spanish conversation and writing.