Spanish language Q&A Forum

I was searching for a little information on reflexive verbs and ended up with the best lesson yet! By following the links at Reflexive verbs I found so much valuable information that I'll be breathless for the next few days as I absorb it all . . .Thanks Inma 

Hola Inma

In this test question: 

"Aquella chica del colegio, ________ todos se reían, estaba siempre triste"

I managed to get all these correct: de la que, de quien, de la cual. But my answer de que was incorrect.

OK, I admit that I did follow a pattern here and guess that this question required 'de' in front of the pronoun, so I actually have two questions about this:

1) why is 'de' required in this particular structure (but not usually)?

2) why is 'de que' incorrect? (but all the others require 'de')

I ask because I don't see any reference to these nuances in the above lesson

Saludos  

Please help me follow this explanation.

"We use the preposition "de" after the adjective..." by adjective do you mean facil/dificil?

when the subject is "the thing" (el armario) - Can you expand please as to what "the subject being the thing" means? What thing? What does thing refer to here?

"...not when the subject is "doing something" (montar el armario)."  Isn't the subject always doing something? I don't understand this distinction.

All the examples are great and I can sense the pattern but I'd like something more concrete to be able to lock-in to the rule please :-)