YOU SAID:
sometimes I get sad for reasons which even i can't comprehend
INTO JAPANESE
時々私は理解できない理由で悲しくなる
BACK INTO ENGLISH
Sometimes I get sad for the reason I can not understand
INTO JAPANESE
理解できない理由で悲しくなることがあります
BACK INTO ENGLISH
Sometimes it makes me sad for reasons I can not understand
INTO JAPANESE
理解できない理由で悲しくなることがあります
BACK INTO ENGLISH
Sometimes it makes me sad for reasons I can not understand
You've done this before, haven't you.