La clase comienza a las ocho.

The class begins at eight.

Breakdown of La clase comienza a las ocho.

• la clase: the class
• a: at
• las ocho: the eight
• comenzar: to begin

Questions & Answers about La clase comienza a las ocho.

Why is it a las ocho and not a la ocho or en las ocho?

Spanish uses the preposition a to say “at” a clock time. The article is las because it agrees with the implied plural noun horas (hours): literally “at the eight hours.” You only use the singular article with one o’clock: a la una. You do not use en for clock times in this sense. So:

• Correct: a las dos / a las ocho
• Correct: a la una
• Incorrect: en las ocho, a ocho

Why is las plural if it’s just one time?

Because Spanish conceptualizes clock times as the number of hours on the clock, and the implied noun is plural: las (horas) ocho, las (horas) tres, etc. Only one o’clock is singular: la (hora) una.

What’s the difference between comienza and empieza?

Both mean “starts/begins.” In most of Latin America, comenzar and empezar are interchangeable in everyday speech:

• La clase comienza a las ocho.
• La clase empieza a las ocho. Other near-synonyms you might hear: inicia (a bit more formal/institutional) and, colloquially in some regions, arranca (very informal).

Why is it comienza and not comienzan?

The subject is singular: la clase (the class), so the verb is third person singular: comienza. If the subject were plural, you’d use comienzan:

• La clase comienza… (singular)
• Las clases comienzan… (plural)

What’s happening inside the verb comienza? Why the ie?

Comenzar is a stem-changing verb (e → ie) in the present tense for all forms except nosotros/nosotras (and vosotros in Spain). Examples:

• Yo comienzo
• Tú comienzas
• Él/Ella comienza
• Nosotros comenzamos
• Ustedes/Ellos comienzan Also note the spelling change in the preterite yo form: comencé (z → c before e).

Can I say La clase es a las ocho?

Yes. Ser is used to place events in time: La clase es a las ocho focuses on the scheduled time. La clase comienza/empieza a las ocho focuses on the starting action. In practice, both are common to communicate when something happens.

How do I ask “What time does the class start?”

Use ¿A qué hora…?

• ¿A qué hora comienza la clase?
• ¿A qué hora empieza la clase?

Do I need to add morning/afternoon/night?

Add it if AM/PM isn’t clear:

• …a las ocho de la mañana (morning)
• …a las ocho de la tarde (roughly early afternoon to early evening; exact range varies by region)
• …a las ocho de la noche (evening/night)
• …a las ocho de la madrugada (pre-dawn hours)

How do I say “at eight sharp,” “around eight,” or “from eight to nine”?

• At eight sharp: a las ocho en punto
• Around eight: como a las ocho or a eso de las ocho
• From eight to nine: de ocho a nueve
• A little after eight: poco después de las ocho
• A little before eight: poco antes de las ocho

Can I start with the time: “At eight, the class starts”?

Yes. Spanish allows that topicalization:

• A las ocho, comienza la clase. This is natural and common.

Why is it la clase and not el clase?

Because clase is a feminine noun in Spanish, so it takes la. It’s lowercased unless it begins the sentence.

Do I need the article la before clase?

When referring to a specific class, Spanish normally uses the definite article: la clase. You can also say Comienza la clase (verb first), but you wouldn’t normally drop the article altogether in standard usage. Comienza clase sounds off.

What’s the difference between clase, curso, and materia/asignatura?

• clase: a class session or the course in general (context decides).
• curso: the course as a whole (the series), or a grade level (varies by country).
• materia / asignatura: the academic subject (e.g., math, history). In Latin America, materia is very common.

Can I say Empiezo la clase a las ocho?

Yes, but it changes the meaning. Empiezo la clase… means “I start the class…” (you are the person initiating it, e.g., the teacher). La clase empieza/comienza… means “The class starts…” (event-focused, no explicit agent).

Is La clase se comienza a las ocho correct?

Not in standard usage. Comenzar doesn’t take a reflexive or passive-like se here. Say La clase comienza/empieza a las ocho.

How do I write the time with numerals or 24-hour time?

• With numerals: a las 8 or a las 8:00
• 24-hour style (common in schedules/posters): a las 20:00 In speech, people normally say a las ocho de la noche rather than “a las veinte.”

Why isn’t horas stated, like a las ocho horas?

In everyday speech you don’t say horas; it’s understood. A las ocho is the standard way. A las ocho horas sounds overly formal or technical.

Any pronunciation tips for Latin America?

• comienza: co-MYEN-sa. The z is pronounced like an S in most of Latin America (seseo).
• clase: KLA-se (clear S).
• ocho: OH-cho (the h is silent; the ch is like English “ch”). Regional note: in parts of the Caribbean, the final S in clase or las may be softened or aspirated, but you don’t need to imitate that as a learner.