Muchas gracias, Rosa por tu ayuda. Tenías que esperar un poco tiempo por mi respuesta, lo siento, pero estaba - y aún estoy (y estaré - no sé por cuánto tiempo) - mucho ocupado.

1. This is what I initially wanted to write, but instead I decided to go too far from the original, following my own logic. That’s funny, ‘cause my brain always tries to get me away from literal translating. Also when it’s not needed.

Pretérito versus Imperfecto: Let me explain my reasoning. Two o’clock is only for a split of a second and then it’s one, two or more minutes past two. This way “eran” was not logical for me. Only now I checked the net and indeed when people talk about time they use Imperfecto.

How about “...y la noche estaba casi terminado”?

As I understand “nos ambos” was wrong, because “nos” was not needed - this time I tried to be too literal. I decided to change “we both danced” in my English translation into “we danced together”. It better expresses the meaning. The same I did here - have a look!

I think another option would be: “…tú y yo bailábamos” or “los dos bailábamos”, as you suggested.

2. It was literally what the original said. I used “quejarse” now, but I’m not sure how it sounds. Another option - “no protestaba”. Would it sound better?

3. Corrected. How about the English translation? I think I can say “where at the happy end…”.

And all the rest is my biggest problem in Spanish (stanzas 3 & 4) and for me it’s very important to learn the rule to be able to understand how to deal with it.

“Separamos” versus “separaríamos”. In English you have to be very precise when you chose tenses and there’s no room for your own interpretation - it’s either correct or wrong. Honestly I don’t know how is it in Spanish. I tried to find the rules, but without success. From my observations there seem to be no precise rules, almost like it’s in Polish. In Polish you have to use the past tense in the first part of the sentence (in Spanish without doubt too), but the second part would (always) be in the future tense. For a native English speaker very strange. Here I intuitively decided to use Presente, because it was expressed this way in German. Is it a rule that it has to be Condicional? For me it sounds strange and not logical. It was not a condition or possibility, they knew that it would happen, So why Condicional? Is that the rule that I didn’t find?

4. Regarding what I wrote in point 3 you may ask why I decided to use Condicional here, because both these sentences look pretty similar in Spanish. It was because Conditional was also used in German. Now I wonder why you didn’t like it here when it’s almost the same as in 3 and also in verse 3 in this stanza (4).
Did you mean “terminara” (Subjuntivo Imperfecto) or “terminará” (Futuro)?
If it’s Subjuntivo Imperfecto then I think in the previous stanza it should rather be “separáramos”.

In all these 3 sentences for my logic Subjuntivo Imperfecto seems to makes sense, but Condicional not. Am I wrong?

I corrected everything the way you told me, but I have doubts, ‘cause I’m unable to understand the rules. I would be very grateful if could briefly explain them.

Gracias de antemano.

¡Hola Hans! Gracias por tus comentarios y quisiera decirte que tienes razón. He comentado debajo de la traducción inglesa.

Vale, creo que debería ser:

“Cuando empezaban el beguine”
tú no eras (?) libre y yo estaba comprometido.
Sólo nos quedaban las horas robadas,
nunca perteneciste a mí entera.