YOU SAID:

I'm assuming you meant to send that to someone else.

INTO JAPANESE

あなたはそれを誰かに送るつもりだったと思います。

BACK INTO ENGLISH

I think you meant to send it to someone.

INTO JAPANESE

誰かに送るつもりだったと思います。

BACK INTO ENGLISH

I thought you were going to send it to someone.

INTO JAPANESE

私はあなたがそれを誰かに送るつもりだと思っていました。

BACK INTO ENGLISH

I thought you were going to send it to someone.