YOU SAID:

I am definitly bored in class

INTO JAPANESE

私は間違いなく授業に退屈している

BACK INTO ENGLISH

I'm definitely bored with class

INTO JAPANESE

絶対に授業に飽きてしまう

BACK INTO ENGLISH

You'll definitely get bored in class.

INTO JAPANESE

授業では必ず退屈するでしょう。

BACK INTO ENGLISH

You will always get bored in class.

INTO JAPANESE

あなたはいつも授業で退屈するだろう。

BACK INTO ENGLISH

You will always get bored in class.