Spanish language Q&A Forum

So does the future perfect of indicative adequately express the idea of “must”?

i have read somewhere that perfect tense could be used too

for example, he estudiado desde hace 6 meses. = estudio desde hace 6 meses.

is this piece of information wrong? when can we use perfect tense then?

Why does the use the preterite perfect rather than the simple preterite? 

Can you please add the audio pronunciation :) 

"... becoming essential references ..." >? ... "convirtiéndose éstas en referentes *esenciales* ..."

I came across a sentence in a book I was reading and it said, 

"ya no se sienten ganas de beber"

I understand "ganas" as a noun meaning that they are stating they do not have the "desire" to drink I think. 

Why is sentirse used instead of sentir when "ganas" is the direct object?

Thank you

This is another one incorrectly graded. My answer was criáis, which is the correct Vosotros translation, yet is marked wrong.

I wish there were comprehension questions at the end. It’s annoying that there’s no way to “complete” the reading exercises like the writing and listening ones.