Spanish language Q&A Forum

Hi, I'm really struggling with this one, and there are only two possibilities!  It's "Aquí tienes 20 euro por si……. dinero para un taxi.", with the options of necesitas and necesitaras. The questions says that the speaker thinks there's a low probability of the money being needed.  The correct answer is the imperfect subjunctive, necesitaras.  I suppose that it has to be that because the present indicative is not permissible in this structure, but I don’t know why.

Thanks in advance,

Dave

This sentence was marked as incorrect:

Cuando ella abra sus regalos en navidad a menudo tiene perfume.

The english translation was that often when she opens presents she gets perfume. Doesn't that denote possibility in the future and so it should be subjunctive?

Can this also be translated as:  Va (usted) a salir a comprar pan esta mañana?  If not why not?

I don't understand why instead you'd use:  Usted sale a comprar pan esta mañana?

Thanks, Lia

I keep being marked wrong.  I get an usted question and the answer comes up with a vosotros question and answer.

Is the verb "leer" another example of a verb of perception, or is it something different? Soy bibliotecario para pregunto mis estudiantes sobre leyendo. Recientemente, pregunté un estudiante "Puedes leerlo?" Ella quiso sacar un libro en íngles, pero su ingles está abajo.  La dejé por supuesto. No soy un monstruo.  So, did I ask the right question? (And please correct any errors. I was trying to work through some skills I have been learning. Writing sentences and all that.) Gracias para esta comunidad! 

In the exercise the phrase 'Haciendo la compra a mis mayores' is used. I would have expected 'para mis mayores'. Is the use of 'a' instead a common Spanish usage?

Couldn't you also express the last sentence like this?:

Será un día estupendo!

A quiz question says: "La palabra víspera tiene el tilde en la i"

Not relevant to the lesson, but I thought a tilde was the squiggle over the n (~), not the tick mark? Can it mean both?

Are there 2 adverbs cuándo and cuando? WordReference.com has both listed. I need an explanation on this for A1 beginner (me).

How does one determine whether to use "sido" or "estado" with haber in such instances as "I have been a good person..." or "I have been seen with ..." or "I have not been trying hard to..."?

Also, with regard to "he, has, ha....etc.", is this conjugation referred to as the present perfect indicative, the past perfect indicative (preterito perfecto), or both?