Re: present or past tense?
Line is fine.
Carlos, all too often you ask questions unrelated to the original question. All questions are welcome but PLEASE start new threads to ask those unrelated questions. You can even link back to the original thread to give context but try to imagine your frustration if you asked a question about a tense and came back to find that the thread was now talking about a natural way to express that it's raining.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.