Spanish language Q&A Forum

Esta correcto? En la siguiente oracion, pero en vez de sino esta usado. Creo que despues de negativo  sino debe haber usado no? 

 Vuestros papeles no eran fáciles de entender, pero los nuestros sí

Your papers were not easy to understand, but ours were.

It's not clear which preposition to use with quien for Whose, For Whom / To Whom and With Whom?

Is the below correct?

Whose = de quien

For Whom / To Whom = para quien

With Whom = con quien

I interpret "es" as "is", so how/why is "He" assumed for "Es un excelente actor." -> "He is an excellent actor"?

The question was :  How would you say "If you did some exercise, you would lose weight faster." ?  I understand the principle of using the subjunctive followed by the conditional simple.  I don't understand why there are 2 answers.

Si hicieras más ejercicio, perderías peso más rápido.Si hicieses más ejercicio, perderías peso más rápido.Becky

Why is it "Yo fui el primero DE mi clase" and not "Yo fui el primero EN mi clase" for "I was first in my class?" Is there any difference or is DE also acceptable?