YOU SAID:

i could not get a dog at the zoo because they are not sold there

INTO JAPANESE

動物園では犬が売っていないので犬を飼うことができませんでした

BACK INTO ENGLISH

I couldn't keep a dog because the zoo doesn't sell dogs.

INTO JAPANESE

動物園では犬を売っていないので犬を飼うことができませんでした。

BACK INTO ENGLISH

I couldn't keep a dog because the zoo doesn't sell dogs.