"Kompreneble ili havas bonajn ilojn en sia domo."

Translation: Of course they have good tools in their house.

[ConorHoughton]

Why "sia domo" rather than "ilia domo"?

[Luis_Domingos]

When the possessor in the object position is the same entity as the subject of the sentence, you use the possessive "sia". http://en.wiktionary.org/wiki/sia#Esperanto

[ConorHoughton]

Makes sense - many thanks!

[mycroft34]

How then would "they have good tools in her house" be said in esperanto.

[ShadyXXI]

That would be "Ili havas bonajn ilojn en ŝia domo." Note the accent on the "ŝ". "Ŝia" is the possessive "her", while "sia" is what Luis_Domingos described above.

[Amiko802576]

Is there a plural form of this word? “Siaj”

[salivanto]

I think there's a potential ambiguity in your question. Could you be more precise?

[DavidWolff17]

From another comment: http://en.wiktionary.org/wiki/sia#Esperanto:

sia (accusative singular sian, plural siaj, accusative plural siajn)

[PawelBaj]

But only for the third person singular and plural. 'Mi' and 'vi' requires mia(j)(n) and via(j)(n).

[iainsona]

I gave "It's understandable they have good tools in their house." instead of "Understandably ..." or "Of course ..." Am I that far wrong?

[S.Z.Q.S.]

I'm wondering the same thing. I put "It's understandable hat they have good tools in their house."

[TerraSulla]

Kombreneble is an adverb, therefore "understandably" is a closer translation.

[fotistino]

I put 'understandably' and it was marked wrong, which I'm thinking I should report.

[JanPaulido]

Would this sentence not require that Sia be pluralised ? Ilia - siaj ?

[TerraSulla]

No, because sia complements domo: sia domo = their house.

[JanPaulido]

Thanks. I got it now. :)