Questions & Answers about Moja kolacja była lżejsza i zdrowsza od twojej.
We learned we can use niż for "than". Why does this sentence use od?
In Polish, you can compare things in two ways. You can use niż with the basic Nominative case (like niż twoja), or you can use od followed by the Genitive case, as we see here with od twojej. Both mean "than yours", but od + Genitive is very common and natural in everyday speech.
Why is the pronoun at the end twojej instead of twoja?
It is in the Genitive case because the preposition od always forces the following word into the Genitive when making comparisons. It takes the feminine form twojej because it refers back to the feminine noun kolacja (dinner).
The lesson mentions using bardziej for comparisons. Why aren't we using it here?
Shorter adjectives like lekka (light) and zdrowa (healthy) usually get special endings to make them comparative, rather than using bardziej (more). Here, they take the feminine comparative ending -sza, becoming lżejsza and zdrowsza. You generally save bardziej for longer, more complex adjectives.
Lżejsza means "lighter". What is the base adjective, and why does the spelling change so much?