YOU SAID:

What happened are my very red new pants, father?

INTO JAPANESE

起こった何が私の非常に赤い新しいズボンは父だろうか。

BACK INTO ENGLISH

What has happened is very red new pants for my father?

INTO JAPANESE

私の父の新しい非常に赤いパンツをはいては、何が起こったか。

BACK INTO ENGLISH

Very new my father's wearing red pants, what happened?

INTO JAPANESE

非常に新しい父の身に着けている赤いパンツをはいて、何が起こったか。