YOU SAID:

i'm so bored in class and i haven't moved from my chair since school started

INTO JAPANESE

私は授業中とても退屈で、学校が始まって以来椅子から動いていません

BACK INTO ENGLISH

I was so bored in class that I haven't moved out of my chair since school started.

INTO JAPANESE

授業中は退屈だったので、学校が始まってから椅子から引っ越していません。

BACK INTO ENGLISH

I was bored during class, so I have not moved out of my chair since school started.

INTO JAPANESE

授業中は退屈だったので、学校が始まってから椅子から出て行っていません。

BACK INTO ENGLISH

I was bored during class, so I didn't go out of my chair after school started.

INTO JAPANESE

授業中は退屈だったので、放課後は椅子から出ませんでした。

BACK INTO ENGLISH

I was bored in class, so I didn't get out of my chair after school.

INTO JAPANESE

授業中は退屈だったので、放課後は椅子から出ませんでした。

BACK INTO ENGLISH

I was bored in class, so I didn't get out of my chair after school.