YOU SAID:
I want to kill your uncle-in-law.
INTO JAPANESE
私はあなたの義理の叔父を殺したい。
BACK INTO ENGLISH
I want to kill your uncle-in-law.
INTO JAPANESE
私はあなたの義理の叔父を殺したいです。
BACK INTO ENGLISH
I want to kill your uncle-in-law.
You've done this before, haven't you.