Mi amiga escribió veintisiete líneas del resumen y luego acabó cambiando el final.

My friend wrote twenty-seven lines of the summary and then ended up changing the ending.

Breakdown of Mi amiga escribió veintisiete líneas del resumen y luego acabó cambiando el final.

• mi: my
• y: and
• la amiga: the friend
• escribir: to write

Questions & Answers about Mi amiga escribió veintisiete líneas del resumen y luego acabó cambiando el final.

Why is escribió used instead of escribía?

Escribió is the preterite, which is used for a completed action in the past. Here, the sentence presents writing veintisiete líneas as a finished event.

If you used escribía, it would sound more like an ongoing, repeated, or background action. For example:

• Mi amiga escribía mientras yo leía = My friend was writing while I was reading.

So in this sentence, escribió fits because the action is seen as completed.

What does acabó cambiando mean exactly?

Acabó cambiando means ended up changing.

This structure often suggests that the result was reached after some process, hesitation, or unexpected development. So it is not just she changed the ending, but more like she ended up changing the ending in the end.

Compare:

• Cambió el final = She changed the ending.
• Acabó cambiando el final = She ended up changing the ending.

The second one adds a sense of eventual outcome.

Why is cambiando a gerund here?