Postquam, Ubi, Ut, and Simul Atque

Latin commonly introduces a definite temporal event with postquam “after,” ubi “when,” temporal ut “when, as soon as,” or simul atque “as soon as.” In their straightforward Classical use these conjunctions take the indicative, because the speaker locates an event in the narrated or expected sequence rather than framing it as purpose, result, or background.

This matters for English speakers because “when” and “after” can sound open-ended or hypothetical in English. Latin does not choose the subjunctive merely because an event lies in the future or because the speaker has not yet witnessed it. Identify the conjunction’s function first; then read the indicative tense as a temporal relationship.

Core meanings and diagnostics

The conjunction answers “at what point did or will the main event occur?” It does not itself express cause. A sequence may invite a causal inference in the real world, but grammatical temporal ordering and logical causation remain distinct.

Postquam and the Latin perfect

Postquam marks its clause as earlier than the main event. Classical narrative very often uses the perfect indicative in both clauses. English, by contrast, frequently marks the earlier event with a pluperfect: Latin postquam vēnit, discessimus may naturally become “after he had arrived, we left.”

The perfect lēgī already presents the reading as completed. Postquam establishes that it precedes respondī, so Latin need not repeat that information with a pluperfect. A pluperfect is possible when the author has independent reason to look back from an established past reference point, but it is not the default English-to-Latin substitution.

Duration after an event can be expressed with a phrase such as postquam plus a time expression, though Classical idiom also has other ways to say “it is three years since.” Do not force every English “since” into postquam.

Ubi: locating the decisive point

Temporal ubi locates the point at which the main action occurs. With a single past event it commonly takes the perfect indicative. In a future sequence Latin often marks the subordinate event as completed with the future perfect, even where English uses a simple present.

Here perfēceris is future perfect indicative: it marks the finishing as complete before the requested return. Its form happens to be identical to the perfect subjunctive in the second-person singular. The temporal conjunction, future-oriented command, and sequence favor the future perfect. Morphological ambiguity does not permit an arbitrary mood label.

In repeated or generalizing contexts, ubi can mean “whenever.” Classical authors may use indicative tenses for observed regularity and subjunctive patterns for generalized or indefinite situations. That broader distinction depends on clause type and viewpoint; it does not overturn the indicative norm for one definite occurrence.

Temporal ut is not purpose ut

Temporal ut means “when” or “as soon as” and normally takes the indicative. Purpose ut means “so that” and requires the subjunctive. Result ut also requires the subjunctive. The word ut alone therefore never identifies the construction.

In the first, perfect indicative orta est gives the temporal point. In the second, present subjunctive solvant gives the sailors’ aim. English “as” and “so that” make the difference explicit; Latin makes it through the whole conjunction-and-mood pattern.

Temporal ut is especially familiar in narrative formulas such as ut prīmum “as soon as.” In (formal/literary) prose, ut may also introduce comparisons or content clauses, so always test what relation it has to the main verb.

Simul atque and immediate succession

Simul atque and the shortened simul ac mean “as soon as,” literally emphasizing that the two situations meet at the same point. They normally take the indicative in definite temporal statements. Simul alone can also carry the same conjunctional force in context.

Again advēneris is best parsed as future perfect indicative. English convention prefers “have arrived” or simply “arrive,” not “will have arrived.” Latin explicitly orders arrival before notification.

Negation and the main-clause relation

These temporal clauses use ordinary nōn when the temporal event is negated. The negative belongs inside the fact being located in time; nē would suggest a different construction, such as purpose or prohibition.

Here nōn directly negates the factual finding. Grammar and discourse point the same way: choose an event that a narrator would naturally locate in time rather than translating an awkward English negative word for word.

An authentic narrative example

Caesar writes in (formal historical prose), here preserved without added macrons:

Perfect passive factī sunt gives the completed acquisition of information. Historical present mittunt makes the next move vivid. The indicative in both clauses presents the sequence as narrative fact; no English “would” belongs in the translation.

When a subjunctive does appear

A subjunctive near one of these markers needs a positive explanation. The clause may be incorporated into indirect discourse, attracted into a subjunctive environment, generalized rather than definite, or colored by another subordinate construction. Poets may also exploit freer temporal relations. Those are legitimate Classical patterns, not evidence that the conjunction normally “takes either mood depending on uncertainty.” See Subordinate Clauses in Indirect Discourse.

Imperfect subjunctive essent is embedded within reported speech and belongs to the reporter’s subordinate perspective. It does not show that ordinary definite ubi clauses are inherently hypothetical.

Common Mistakes

1. Choosing subjunctive because “when” concerns the future

2. Copying the English pluperfect after postquam

3. Reading every ut as purpose

4. Translating every past indicative with “would”

Key Takeaways

Postquam, definite temporal ubi, temporal ut, and simul atque/ac normally take the indicative. Perfect indicatives commonly narrate completed past succession; future perfect indicatives mark an event completed before a future main action. Use nōn for ordinary negation. A subjunctive demands some additional constructional reason, not merely the English speaker’s feeling that a future event is “hypothetical.”