El pasajero cuyo bulto no llegó llamó.

Cuyo means whose or of which/of whom. It shows possession or belonging.

So in El pasajero cuyo bulto no llegó, the idea is:

• the passenger
• whose bag/package didn’t arrive

You cannot use que in the same way here, because que does not show possession by itself.

• El pasajero que no llegó llamó = The passenger who didn’t arrive called
• El pasajero cuyo bulto no llegó llamó = The passenger whose bag didn’t arrive called

So cuyo links pasajero and bulto by showing that the bulto belongs to the passenger.

Because cuyo agrees with the thing possessed, not with the owner.

Here, the possessed thing is bulto, which is:

• singular
• masculine

So we use cuyo.

The forms are:

• cuyo = masculine singular
• cuya = feminine singular
• cuyos = masculine plural
• cuyas = feminine plural

Examples:

• la pasajera cuya maleta no llegó = the female passenger whose suitcase didn’t arrive
• el pasajero cuyos documentos se perdieron = the passenger whose documents got lost

Even though pasajero is masculine singular too, that is not the reason. The agreement is with bulto.

In this context, bulto means a piece of luggage, package, or item/bundle.

It is a fairly general word. Depending on context, English might translate it as:

• bag
• piece of luggage
• parcel
• bundle

In travel situations, Spanish speakers might also use more specific words like:

• maleta = suitcase
• equipaje = luggage
• bolsa = bag

So bulto here sounds like the passenger whose item/piece of luggage didn’t arrive.

Because cuyo already introduces the relative clause by itself.

In English, we often say:

• the passenger whose bag didn’t arrive

Spanish does the same thing:

• el pasajero cuyo bulto no llegó

You do not normally say:

• el pasajero que cuyo bulto... ❌

That would be incorrect. Cuyo already does the linking job.

Both are in the preterite tense, which is used for completed past actions.

• llegó = arrived / did arrive
• llamó = called / phoned

So the sentence presents two completed events in the past:

1. the bag did not arrive
2. the passenger called

This is very natural if we are talking about a specific incident, for example at an airport.

Compare:

• no llegó = it didn’t arrive
• llamó = he/she called

If you changed the tense, the meaning would also change:

• no llegaba = it wasn’t arriving / used not to arrive / hadn’t arrived yet, depending on context
• llamaba = he/she was calling / used to call

Here the preterite is the most straightforward choice.

Llamar can mean different things:

• to call someone/something by a name
• to call someone
• to phone / ring

Here it means to call / phone, and Spanish can use it without stating the person or place called if that information is obvious or unimportant.

So:

• llamó = he/she called / he/she phoned

If you wanted, you could add more detail:

• llamó a la aerolínea = he/she called the airline
• llamó al aeropuerto = he/she called the airport

But the sentence is fine without that extra information.

Yes. The main subject of the sentence is El pasajero.

The part cuyo bulto no llegó is just extra information describing that passenger.

So the structure is:

• El pasajero = main subject
• cuyo bulto no llegó = relative clause describing the passenger
• llamó = main verb

A useful way to see it is this:

• Main statement: El pasajero llamó
• Which passenger? El pasajero cuyo bulto no llegó

So it is the passenger who called, not the bulto.

Yes, although cuyo is the neatest and most formal/direct option.

A very common alternative is to rephrase with que:

• El pasajero al que no le llegó el bulto llamó.

Literally, this is something like:

• The passenger to whom the bag didn’t arrive called

That sounds less natural in English, but it is very natural in Spanish.

Another possible rephrasing:

• El pasajero cuyo equipaje no llegó llamó.

That just changes bulto to equipaje.

Learners often avoid cuyo because it feels formal or unfamiliar, and native speakers often do use other structures in everyday speech. But cuyo is fully correct and important to know.

It is completely correct and normal, but in everyday conversation many speakers often prefer other structures because they feel more natural or less formal.

For example, instead of:

• El pasajero cuyo bulto no llegó llamó

many people might say:

• El pasajero al que no le llegó el bulto llamó
• El pasajero al que no llegó su maleta llamó

So you should definitely learn cuyo, especially for reading and formal or careful writing, but you should also expect to hear alternatives in real life.

They have written accents to mark the stress and to distinguish the correct verb forms.

• llegó = he/she/it arrived
• llamó = he/she called

The accent shows stress on the last syllable:

• lle-GÓ
• lla-MÓ

Without the accent, llego and llamo would be different forms:

• llego = I arrive
• llamo = I call

So the accent is important because it changes the meaning.

Then cuyo would change to agree with that noun.

Examples:

• El pasajero cuya maleta no llegó llamó.
  = The passenger whose suitcase didn’t arrive called.

• El pasajero cuyos bultos no llegaron llamó.
  = The passenger whose packages/pieces of luggage didn’t arrive called.

• La pasajera cuyas maletas no llegaron llamó.
  = The female passenger whose suitcases didn’t arrive called.

Notice again: the form of cuyo depends on the noun after it:

• maleta → cuya
• bultos → cuyos
• maletas → cuyas