YOU SAID:
if that happens ill eat my hat
INTO JAPANESE
それが起こったら、私の帽子を食べない
BACK INTO ENGLISH
If that happens, don't eat my hat
INTO JAPANESE
それが起こったら、私の帽子を食べないでください
BACK INTO ENGLISH
If that happens, don't eat my hat
You've done this before, haven't you.