他们没有买用英文怎么说

如果指的是某物没有被买，可以用英语表示为 "it was not bought" 或者 "they did not buy it"。

这个表达来源于动词 "buy" 的过去式和否定形式。"Buy" 是一个动词，意思是 "购买"，过去式是 "bought"，否定形式是 "did not buy"。

例句：

They did not buy the house. (他们没有买房子。)
The book was not bought by them. (这本书没有被他们买。)
She did not buy the ticket. (她没有买票。)
It was not bought by him. (它没有被他买。)