nieve / nieva after antes de que
Mango Languages teaches "antes de que nievE" for "before it snows." Google Translate gives "antes de que nievA." Which is correct? My uninformed self is casting a preliminary vote for Mango because it seems to me that the snow is merely anticipated and that there's uncertainty that it will actually fall, but to be sure, I'd love to hear from someone more in-the-know than I.
(My class was over as of Monday night. This isn't homework. LOL. )
7 Answers
Per my favorite course:
http://users.ipfw.edu/jehle/courses/SUBJADV.HTM
Antes de que always take subjunctive. Which is what I always do. This is of course written for students, so I will not swear that there is not some rare exception, but it should be considered the general rule.
Adverbial conjunctions which are ALWAYS followed by the subjunctive (because they always indicate a pending/hypothetical action or state):
Conjunction Translation Corresponding preposition
a fin de que so that a fin de
a condición de que on the condition that
a menos que unless
a no ser que lest, unless
antes (de) que before antes de
con tal (de) que provided that con tal de
en caso de que in case en caso de
no sea que / no fuera que lest, so that ... not (= para no)
para que so that Para
sin que without sin
Right form: "Antes de que nieve."
So many people say: "Antes de que neve", which is wrong but it is a common mistake we make here.
Just a short intrusion to attempt to make things clearer.
"Antes de que" is one of these conjunctions that can be followed by a verb either in the "indicative" mode or "subjunctive" mode.
If the action is yet to happen, then the subjunctive is used. "Voy a preparar mi casa contra la inundación antes de que llueva. "
If you did it in the past, it would go like this. Preparé mi casa con contra la inundación antes de que llovió.
If it is a regular on-going thing, it takes the indicative.
Cada año preparo mi casa contra la inundación antes de que llueve.
¡Caramba, qué lluvia!
Well, in my humble opinion, there are two possible situations here which would call for different treatments. As it very rarely snows here in New Orleans, I'll use "rain," as it does rain a lot here, and both of these following situations occur quite frequently.
Situation 1 The forecast calls for a 40% chance of rain in the afternoon. It's a little cloudy in the morning, but it doesn't look like it will rain soon. However, you're going out for the day with some friends in their car. You say, "I'm going to put the top up on the convertible before it rains." As we all know how accurate forecasts are, rain is only a possibility. The subjunctive would be used.
Situation 2. You're at home, and you here thunder. You look out the window, and heavy black clouds are rolling in fast, lots of lightning and thunder. You say, I'm going to put the top up on the convertible before it rains." This would use the indicative. You know it's going to rain.
My audio course makes that distinction many times, and it depends on if you're pretty sure or if you really don't know.
De acuerdo con Bosque: antes de que nieve.
Otros ejemplos:
Antes de que anochezca.
Antes de que amanezca.
Antes de que llueva.
Antes de que cierren.
Antes de que regresen.
Saludos! 
Para Wnky a disfruta .
Para AnnRon y tus perros .
