For 10 points, name this grammatical mood, which typically expresses emotion, opinion, or uncertainty.
In Spanish, this construction is formed by replacing the "o" in the first personal singular form with the ending for the opposite type of verb. In English, it exists in fixed phrases such as "until death do us part" and "long live the king." In Italian, this construction is used in clauses subordinated to the phrase "I think that," in contrast to French, where the (*) indicative would be used. For 10 points, name this grammatical mood, which typically expresses emotion, opinion, or uncertainty.
In Spanish, this construction is formed by replacing the "o" in the first personal singular form with the ending for the opposite type of verb.
{subjunctive} mood