Spanish language Q&A Forum

Rather than giving a dozen examples (which frankly seem as though could be interchangeable) I wish this section would begin with usage rules... under what general circumstances does one typically apply cada vs toda? And then under each rule place the examples to illustrate and underscore.

This left me somewhat down hearted.  I thought I was further along than my terrible score!  I guess I'll keep trying in the hopes I won't do this bad in the future.  :(

Esta ha sido la competición más importante que jamás se haya celebrado. Why not celebrada to agree w/competición? Thx

Lesson = Me gusta viajar en tren.  Why not gusto?  I like = gusto, right?  Also, pretty much the same question for the use of cuesta, not cuesto in this lesson. Aren't they referring to the (masculine) ticket (el billete)?  I have a feeling I am missing something covered in our lessons!  

(As always, thank you for your help)

Why is “looking for solutions for their diseases” translated in the singular “su enfermedad” instead of the plural “sus enfermedades”? Thank you. 

I wonder to know whether the second sentence need add ´´la´´ to indicate ´´the´´ meaning or not?  Thanks.

Nosotros todavía no salimos del trabajo.        /We haven't yet left work.

Juan todavía no salió de casa.      /Juan has not left the house yet.

Hola, querría preguntar si podemos decir "Ella se porta mal siempre cuando viene de visita" en vez de "Ella se porta mal siempre que viene de visita."

Please could you explain why in the writing translation exercise on Picasso the correct answer is “fue pintado” in the passive form and not estaba pintado. Please explain the distinction between the 2 sentences