YOU SAID:

i will eat my hat if you do that

INTO JAPANESE

あなたがそうするなら、私は帽子を食べます

BACK INTO ENGLISH

If you do, I will eat a hat

INTO JAPANESE

そうすれば、私は帽子を食べるだろう

BACK INTO ENGLISH

Then I will eat a hat

INTO JAPANESE

それから私は帽子を食べる

BACK INTO ENGLISH

Then I will eat my hat

INTO JAPANESE

それから私は私の帽子を食べる

BACK INTO ENGLISH

Then I will eat my hat