YOU SAID:

I can’t find my trousers they were left at the airport by my stupid sister in law

INTO JAPANESE

義理の姉が空港に残したズボンが見つからない

BACK INTO ENGLISH

I can't find the pants my sister-in-law left at the airport

INTO JAPANESE

義理の姉が空港に残したズボンが見つからない

BACK INTO ENGLISH

I can't find the pants my sister-in-law left at the airport