YOU SAID:

I'll cross that bridge when I get to it.

INTO JAPANESE

私はそれに着くと、私はその橋を渡ります。

BACK INTO ENGLISH

When I get to it, I cross that bridge.

INTO JAPANESE

私がそれに着くと、私はその橋を渡ります。

BACK INTO ENGLISH

When I get to it, I cross that bridge.