YOU SAID:

People don't realize how sad I am sometimes.

INTO JAPANESE

人々は私が時々どれほど悲しいか理解していない。

BACK INTO ENGLISH

People do not understand how sad I am from time to time.

INTO JAPANESE

人々は私が時々悲しいことを理解していない。

BACK INTO ENGLISH

People do not understand sometimes I am sad.

INTO JAPANESE

人々は時々私が悲しいことを理解していない。

BACK INTO ENGLISH

People sometimes do not understand sad things.

INTO JAPANESE

人々は時々悲しいことを理解しません。

BACK INTO ENGLISH

People sometimes do not understand sad things.