YOU SAID:
physics class is the reason that I cannot sleep
INTO JAPANESE
物理学のクラスは私が眠れない理由です
BACK INTO ENGLISH
Physics class is why I can't sleep
INTO JAPANESE
物理学のクラスは私が眠れない理由です
BACK INTO ENGLISH
Physics class is why I can't sleep
You've done this before, haven't you.