YOU SAID:

My mind must have been locked in chains

INTO JAPANESE

私の心は鎖に縛られていたに違いない

BACK INTO ENGLISH

My heart must have been bound in chains.

INTO JAPANESE

私の心は鎖で縛られていたに違いない。

BACK INTO ENGLISH

My heart must have been chained.

INTO JAPANESE

私の心は鎖でつながれていたに違いない。

BACK INTO ENGLISH

My heart must have been chained.