Some stuff from Trigedasleng: Ai don fis em op. "I cured him." Ai don breik em au. "I freed him." So ''em'' means ''him'', but what ''op'' and ''au'' means? It's like ''fis op'' and ''breik au'', but when we use it in the sentence these goes to the end?

Not all the way to the end of the sentence. They're placed directly after the direct object of the sentence, and the direct object follows the verb. Thus:

- Ai don ge fis op. "I was cured."

- Ai don fis em op. "I cured him."

- Ai don fis gona op. "I cured the warrior."

- Ai don fis disha gona op. "I cured this warrior."

- Ai don fis disha spichen gona op. "I cured this lying warrior."

If something comes after the direct object, though, the post-verbal particle comes first, e.g.:

Ai don fis em op gon heda. "I cured him for the commander."

Think of these verbal satellites as just two parts of the same verb that have an object in between them, if an object is present.