YOU SAID:
When I'm working to my classes I get bored
INTO JAPANESE
私は私のクラスに働いているとき、私は飽き
BACK INTO ENGLISH
When I'm working in my class, I get bored
INTO JAPANESE
私は私のクラスで働いていたとき、私は退屈します
BACK INTO ENGLISH
When I was working in my class, I'm bored
INTO JAPANESE
私は私のクラスで働いていたとき、私は退屈です
BACK INTO ENGLISH
When I was working in my class, I'm bored
That didn't even make that much sense in English.