Quote:
Originally Posted by wrholt
Almost. It's more accurate to say: [Is it] as simple as "hasta que" in the past in relation to the focus time of the sentence and that describes a completed event requires the indicative, "hasta que" in the present or future in relation to the focus time of the sentence or that describes a hypothetical event requires the subjunctive. The main verb of the sentence may itself be past, present or future, although in practice when the main verb of the sentence is in the future, the verb in hasta que typically is in the subjunctive.
On the other hand, "antes de que" really is that simple: by virtue of its meaning, it demands the subjunctive almost automatically.
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Quote:
Originally Posted by laepelba
Would it be possible for you to give an example or two? 
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The simplest examples for "hasta que" are in the past:
a)
No quería hacerlo hasta que José llegó. Focus time is in the past, after José arrived. Following sentences may continue with what happened after he arrived.
b)
No quería hacerlo hasta que José llegara. Focus time is in the past, when José had not yet arrived. Following sentences may continue with what happened while waiting for José to arrive.
The meaning of "hasta que" allows this distinction.
With "antes de que" we have:
c)
No quería hacerlo antes de que José llegara. Focus time is in the past, during a time when José had not arrived yet.
However:
d)
*No quería hacerlo antes de que José llegó. This sounds like nonsense, because by meaning "antes de que" places the focus time before the arrival, which is inconsistent with using the indicative. Native speakers who want to say that José had arrived would normally use "hasta que" and say (a).
Examples in the present and future will have to come later: I'm about to head out to an event and I'll be back this evening.
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Ok, I had some time to do a little bit of checking.
In the case of present tense sentences that use "hasta que", you might say:
e)
Quiero hacerlo hasta que José venga. Focus is now, and identifies what is happening now: José has not arrived yet.
f)
Siempre quiero hacerlo hasta que José viene. This sentence describes habitual action, rather than what is happening right now. (I'm not certain that this is vailid with "hasta que", but B&B has examples with other conjuctions of time.)