YOU SAID:

cross that bridge when we get there

INTO JAPANESE

我々がそこに着くときその橋を渡る

BACK INTO ENGLISH

Cross that bridge as we get there

INTO JAPANESE

私達がそこに着くと同時にその橋を渡る

BACK INTO ENGLISH

As we reach there cross the bridge at the same time

INTO JAPANESE

そこに着くと同時に橋を渡る

BACK INTO ENGLISH

As you get there you cross the bridge

INTO JAPANESE

そこに着くと橋を渡ります

BACK INTO ENGLISH

Cross the bridge when you get there

INTO JAPANESE

あなたがそこに着いたら橋を渡る

BACK INTO ENGLISH

Cross the bridge when you get there