YOU SAID:
it was irresponsible of him to put their refrigerator on the shelf, because she had said the shelf was unstable
INTO JAPANESE
彼女が棚が不安定だと言っていたので、冷蔵庫を棚の上に置くのは彼にとって無責任だった
BACK INTO ENGLISH
It was irresponsible of him to put the refrigerator on a shelf because she said the shelf was unstable.
INTO JAPANESE
彼女が棚が不安定だと言ったからといって冷蔵庫を棚の上に置くのは彼が無責任だった。
BACK INTO ENGLISH
It was irresponsible of him to put the refrigerator on a shelf just because she said the shelf was unstable.
INTO JAPANESE
彼女が棚が不安定だと言ったからといって冷蔵庫を棚の上に置くのは彼が無責任だった。
BACK INTO ENGLISH
It was irresponsible of him to put the refrigerator on a shelf just because she said the shelf was unstable.
That didn't even make that much sense in English.