YOU SAID:

my sista died this morning in the afternoon

INTO JAPANESE

私のシスターは午後に今朝亡くなりました

BACK INTO ENGLISH

My sister died this morning in the afternoon

INTO JAPANESE

私の妹は今朝午後死んだ

BACK INTO ENGLISH

My sister died this afternoon

INTO JAPANESE

私の妹は今日の午後死んだ

BACK INTO ENGLISH

My sister died this afternoon