YOU SAID:

the apple ate the pie while he was on his bike going to the cat.

INTO JAPANESE

彼が自転車に乗っている間、リンゴはパイを食べました。

BACK INTO ENGLISH

While he was riding a bicycle, the apple ate pie.

INTO JAPANESE

彼は自転車に乗っている間、リンゴはパイを食べました。

BACK INTO ENGLISH

While he was riding a bicycle, the apple ate pie.