El asesinato ocurrió ayer.

In Spanish, it is very common to use the definite article with nouns when talking about a specific event or thing. Here, el asesinato means the murder.

Leaving out el would sound incomplete in this sentence, because asesinato is the subject of the verb. Spanish usually needs an article here unless there is some other determiner, such as este asesinato or un asesinato.

Here, asesinato is a noun, not a verb.

• asesinato = murder / assassination
• asesinar = to murder
• asesinado = murdered or murder victim, depending on context

So in El asesinato ocurrió ayer, asesinato is the thing that occurred.

Ocurrió is the preterite form, used for a completed event in the past.

Because ayer means yesterday, the sentence is referring to a finished action at a specific time in the past. That is exactly the kind of situation where Spanish normally uses the preterite:

• ocurre = it occurs / it is occurring
• ocurrió = it occurred

So El asesinato ocurrió ayer uses the natural past tense for a completed event.

It comes from ocurrir, which means to occur or to happen.

Ocurrió is the third-person singular preterite form:

• yo ocurrió ❌
• él/ella/ello ocurrió ✅

In this sentence, the subject is el asesinato, which is singular, so ocurrió is the correct form.

The accent mark shows the correct stress: o-cu-RRIÓ.

Without the accent, the spelling would suggest a different stress pattern, and it would not be the correct written form of the preterite. Many third-person singular preterite forms in Spanish have a written accent, for example:

• habló
• comió
• vivió
• ocurrió

So the accent is an important part of the spelling, not optional.

A simple pronunciation guide is:

oh-koo-RRYOH

More closely:

• o as in a short, pure o
• cu like koo
• rrió has a rolled or strong r sound because of rr
• stress falls on the last syllable: rrió

So the full sentence is approximately:

el ah-seh-see-NAH-toh oh-koo-RRYOH ah-YEHR

In Spain, c before i in asesinato is pronounced like the th in thin. In much of Latin America, it sounds like s.

Yes, ayer can move, because Spanish word order is more flexible than English word order.

These are all possible:

• El asesinato ocurrió ayer.
• Ayer ocurrió el asesinato.
• Ayer el asesinato ocurrió. — possible, but less natural

The most neutral version is El asesinato ocurrió ayer.

Putting ayer first often gives it a little more emphasis, as if you are highlighting when it happened.

Yes, but the nuance is a little different.

• ocurrió = occurred
• sucedió = happened / took place
• pasó = happened, but often more conversational

For a formal or neutral statement about an event, ocurrió and sucedió are both very natural. Pasó is possible in many contexts, but ocurrió often sounds a bit more precise or formal in news-style language.

Because fue comes from ser/ir, and that would not express occurred in the same direct way.

Spanish usually uses verbs like:

• ocurrir
• suceder
• pasar

for events that happen.

You might hear other structures in different contexts, but for a sentence like this, ocurrió ayer is the most straightforward way to say that the event took place yesterday.

No.

• muerte = death
• asesinato = murder

Muerte is a general word and does not necessarily imply a crime. Asesinato specifically refers to an intentional killing, usually with a legal or criminal sense.

So this sentence is specifically about a murder, not just a death.

The personal a is used before a direct object that refers to a specific person.

But in El asesinato ocurrió ayer, there is no direct object at all. Instead:

• El asesinato = the subject
• ocurrió = the verb
• ayer = time expression

Since no person is being used as a direct object, there is no reason to use the personal a.

Normally, no. With ayer, the preterite is the natural choice because it refers to a completed event at a specific time.

The imperfect is used for background, repeated actions, or ongoing situations in the past. For example:

• Ayer llovía. = Yesterday it was raining.
• El asesinato ocurrió ayer. = The murder occurred yesterday.

The murder is treated as a single completed event, so the preterite fits best.

Yes. Ocurrir is a general verb meaning to occur or to happen, and it can be used with many kinds of things:

• El accidente ocurrió anoche. = The accident occurred last night.
• Eso ocurrió hace años. = That happened years ago.
• Se me ocurrió una idea. = An idea occurred to me.

That last example is especially useful, because ocurrirse is often used for ideas that come to mind. So ocurrir is a very common and versatile verb.