Any Spanish Speakers Here...Please?

I have to use the "imperfecto del subjuntivo" in a sentence. I am using it in a "Si" (if) clause. For example:

Si yo estuviera ahora en Costa Rica hablaría español.
(If I lived in Costa Rica, I would speak Spanish).

My question: do both verbs in the sentence have to be in "yo" form? Or is it possible to write a sentence like this:

Si no estudiaras cada noche, la clase estaría muy difícil.
(If you do not study each night, the class would be difficult).

Is the second sentence incorrect grammar? Would it be the class "will be" difficult, therefore making you use the future tense?

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ditto chica... my head started spinning when I read the subjuntivo something or other...

Yo soy de Costa Rica.

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Hey DayDreamer! Mucho gusto. De Puerto Rico :)

The problem is that to say "If you don't study every night, the class would be difficult" sounds REALLY awkward: "Si no estudias todas las noches, la clase seria dificil"

It just sounds wrong. So "La clase sera dificil" is a better choice.

Word

The rule is, with "Si" clauses:

Si + past subjunctive, ....conditional.

Si + present imperfective, .....future.

I think that's right.

Ouch Rose! I've been studying Spanish 7 weeks and I can say that!

It's sad that I'm learning the same thing as Millie and I have no idea what she's talking about. I only knew because of the Si (if) clause part.

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