YOU SAID:

If he's able to do it, ill eat my own hat

INTO JAPANESE

もし彼がそれを行うことができれば、病気は私自身の帽子を食べる

BACK INTO ENGLISH

If he could do it, I'll eat my own hat

INTO JAPANESE

もし彼がそれをできるなら、私は自分の帽子を食べるだろう

BACK INTO ENGLISH

If he could do it, I would eat my hat.

INTO JAPANESE

もし彼がそれをするなら、私は帽子を食べるだろう。

BACK INTO ENGLISH

If he does it, I will eat a hat.

INTO JAPANESE

もし彼がそれをするなら、私は帽子を食べるでしょう。

BACK INTO ENGLISH

If he does it, I will eat a hat.