Questions & Answers about Ni kontrolis la valuton kaj la kurzon.
Because -is marks the past tense in Esperanto.
- kontrolas = checks / is checking
- kontrolis = checked
- kontrolos = will check
So Ni kontrolis... means We checked...
The -n ending marks the direct object in Esperanto. It shows what was checked.
In this sentence:
- Ni = we
- kontrolis = checked
- la valuton = the currency
- kaj = and
- la kurzon = the rate / exchange rate
So both valuton and kurzon are things being checked, which is why both take -n.
Esperanto often repeats la before each noun when two separate nouns are joined by kaj.
So:
- la valuton kaj la kurzon = the currency and the rate
This is fully normal and clear. You may sometimes see structures where a determiner is not repeated, but repeating la before each noun is very standard and often the clearest choice.