Spanish language Q&A Forum

Can you wait at the door?

Ustedes pueden .....etc 

Why ustedes, ustedes = they 

I am having some difficulties with this sentence: Los empleados de la tienda se quedaron perplejos.

Why is quedarse used here and not quedar? I went back to the lesson that deals with the differences and therein both are used with an adjective or participle to express the result of an action (=quedar) or change (=quedarse). For quedar + adjective, it is also written that the meaning is rather "to end up", and I feel like it fits well in the sentence above: they ended up perplexed due to what Beru did. 

Could both be correct in this context?

Thanks!

What's the difference between:

Hace ocho semanas que estudié.

y

Hace ocho semanas estudié.

I understand the first sentence from this lesson, but is the second one just incorrect or does it mean something else?

It would be great to provide the meanings of some of the expressions such as higos a brevas and se mantiene en sus trece.  Also, I would like to be able slow the speed down as they are speaking a bit fast.