YOU SAID:

If only I had had done it, this sentence would translate in a correct manner.

INTO JAPANESE

私がそうしていれば、この文は正しく翻訳されたでしょう。

BACK INTO ENGLISH

If I had done so, this sentence would have been translated correctly.

INTO JAPANESE

もしそうしていれば、この文は正しく翻訳されたでしょう。

BACK INTO ENGLISH

If so, this sentence would have been translated correctly.

INTO JAPANESE

もしそうであれば、この文は正しく翻訳されたはずです。

BACK INTO ENGLISH

If so, this sentence should have been translated correctly.

INTO JAPANESE

そうであれば、この文は正しく翻訳されているはずです。

BACK INTO ENGLISH

If so, this sentence should have been translated correctly.