YOU SAID:
The human mind seems to be incapable of understanding passive voice.
INTO JAPANESE
人間の心は受動態を理解することができないようです。
BACK INTO ENGLISH
The human mind does not seem to understand the passive voice.
INTO JAPANESE
人間の心は受動態を理解していないようです。
BACK INTO ENGLISH
The human mind does not seem to understand the passive voice.
You've done this before, haven't you.