YOU SAID:

This class is extremely boring and i'm tired

INTO JAPANESE

このクラスはとても退屈で、私は疲れています

BACK INTO ENGLISH

This class is so boring I'm tired

INTO JAPANESE

このクラスはとてもつまらないので疲れました

BACK INTO ENGLISH

This class is so boring that I am tired.

INTO JAPANESE

このクラスはとてもつまらないので、疲れます。

BACK INTO ENGLISH

This class is so boring that I am tired.