YOU SAID:
this is the most boring thing i have ever done
INTO JAPANESE
これは私がやった最も退屈なこと
BACK INTO ENGLISH
Most boring thing I've done this
INTO JAPANESE
これをやった最も退屈なこと
BACK INTO ENGLISH
Most boring thing you've done this
INTO JAPANESE
これをやった最も退屈なこと
BACK INTO ENGLISH
Most boring thing you've done this
That didn't even make that much sense in English.