Questions & Answers about Ang luma mong aklat ay nasa ilalim ng lamesa.
Ang is a marker that usually points to the topic or focus of the sentence—often the equivalent of “the” in English for that focused noun phrase.
- Ang luma mong aklat = The old book of yours / your old book
- The part marked by ang is what the sentence is mainly “about.”
In Ang luma mong aklat ay nasa ilalim ng lamesa, the sentence is basically saying:
As for your old book, it is under the table.
So ang appears at the start because that whole phrase is the topic.