Aleks Syntek has a real problem. He sings:

Yo no sé qué sucedió
I don’t know what happened
[Aleks Syntek - Intocable - Caption 1]

There are various words and phrases one can use in Spanish to say that something “happens.” The most common verb is pasar. Aleks could have sung Yo no sé qué pasó, and nobody would have blinked. If you saw a friend’s dog lying motionless with his tongue hanging out, you would probably ask:

¿Qué le pasó a tu perro?
“What happened to your dog?”

If you said:

¿Qué le sucedió a tu perro?, it would mean the same thing but it would sound a tad literary. They are both great words, but it’s always a good idea to use the most common word first (pasar) and save the less-used word as a synonym (suceder).

Be careful, though. Suceder does not only mean “to happen.” The same goes for pasar. Take this sentence, for example:

Benedicto sucedió a Juan Pablo en el trono papal.
“Benedicto succeeded John Paul on the papal throne.”

Here sucedió means “succeeded” in the sense of “to come next after” or “to replace”. But it does not mean “to be successful”. To say this in Spanish, you would use the phrase tener éxito:

¡Yo nunca tengo éxito!
I never succeed.

Remember that éxito has nothing to do with an "exit." “Exit” is salida.

Pasar can mean several things as well. In the imperative, it means “Go ahead!”

¡Pase por aquí, por favor!
“Come [or Go] this way, please!”

And when you can’t tolerate or put up with something or someone, when you can’t “suffer” him or her, the verb pasar is also a good choice:

A ese tonto no lo paso.
I don't stand that fool.

The verb pasar has dozens of meanings but let’s wrap this up: it can also mean “to swallow.” In this sense one usually uses it reflexively. If a child procrastinates at the table, with food in his mouth, his mother might raise her voice, saying:

¡Ya pásatelo!
“Swallow it already!”

Without the reflexive particle te, it would mean “Pass it over!” or “Pass it on!”, which is not the same thing.

So, now you know what happened, lo que pasó or lo que sucedió. But Aleks Syntek is still out of the loop… Poor  guy!

When it’s over, it’s over. It’s like in Aleks Syntek’s song Intocable (“Untouchable”), where the poor guy was dumped and ends up consoling himself by singing

Debo salir adelante
I must move on
[Aleks Syntek - Intocable - Caption 6]

In Spanish, when we want to express an obligation or a responsibility, we use the verb deber, properly conjugated of course, followed by the infinitive of the verb denoting the action that we must carry out.

Debo hacer mi tarea.
I must do my homework.

"Deber + infinitive" tends to imply a sense of *internal* obligation, whereas "tener que + infinitive," which is extremely common and very close in meaning, tends to convey a sense of *external* obligation.

So any time you want to express a sense of responsibility or obligation, especially one that stems of an internal sense of duty, just conjugate the verb deber and then add the infinitive of the action verb.

Sé que no será fácil pero debo confesarle la verdad.

If you've ever been to Spain, you know that ¿Vale? (OK?) or Vale. (OK.) is slang that is thrown around a lot amongst Spaniards. ¿Vale?

 How would we treat quién if Julia were to have made her statement positive?

As it turns out, an accent is still required, even though most English speakers would not consider this an indirect question. You might look at this as a case where an indirect question is present, but it is being answered. The highly respected María Moliner dictionary calls this type of usage aclaratoria (explanatory). Note that there is still no noun or pronoun present to which quién is referring, so it is not behaving as a relative pronoun.

Like other interrogative pronouns, quién also retains the tilde when used in exclamatory way. (You will notice that these "quién" exclamations don't translate to English literally.)

In this same vein, the phrase como quien means "like a person who" or "like someone who," sometimes best translated into English with "as if he/she [were someone he/she is not]":

Él contestó el interrogatorio como quien nunca hubiera conocido a la víctima.
He answered the interrogation like someone who [as if he (was someone who)] never had met the victim.

And, in another "indefinite" role, quien can also be used in place of nadie que (nobody that / nobody who) in phrases like this one:

No hay quien me detenga.
There is not anybody who can stop me. / There is nobody who can stop me.
[In English we can't have the double negative]

To tell the tale of Speedy, A.B. Quintanilla starts, "Érase una vez" -- which means "Once upon a time." Hearing these words, listeners instantly know we are entering fairy-tale territory. "Érase una vez" or  "érase que se era" or "había una vez" are all ways to set up a fictional tale in Spanish, just like "once upon a time" in English. It's a fairy-tale convention.

Another convention we're all familiar with is the ending "And they lived happily ever after." In Spanish, you may hear: "Vivieron felices y comieron perdices" -- which a more literal translation would render "they lived happily and ate partridges." You see, partridges (perdices) are considered delicacies, so eating them signifies the good life. Plus, it rhymes.

Let's end on another rhyming note:

Y colorín colorado
este cuento se ha acabado
And that´s the end of that
[or]
Snip, snap snout,
this tale's told out.
 
So to sign off this lesson, let's just say:

Y colorín colorado
esta lección se ha acabado.