YOU SAID:

i'll cross the bridge when I get to it

INTO JAPANESE

着いたら橋を渡ります

BACK INTO ENGLISH

Cross the bridge when you get there

INTO JAPANESE

そこに着いたら橋を渡ります

BACK INTO ENGLISH

When you get there, cross the bridge.

INTO JAPANESE

そこに着いたら、橋を渡ります。

BACK INTO ENGLISH

When you get there, cross the bridge.