YOU SAID:
i am sad because i am in school
INTO JAPANESE
私は学校にいるので、私は悲しいです
BACK INTO ENGLISH
I'm sad because I'm in school
INTO JAPANESE
学校にいるから悲しい
BACK INTO ENGLISH
I'm sad because I'm at school
INTO JAPANESE
学校にいるから悲しい
BACK INTO ENGLISH
I'm sad because I'm at school
You've done this before, haven't you.