YOU SAID:
Have you forgotten the lessons I taught you?
INTO JAPANESE
私が教えたレッスンを忘れましたか?
BACK INTO ENGLISH
Have you forgotten the lesson I taught you?
INTO JAPANESE
私が教えたレッスンを忘れましたか?
BACK INTO ENGLISH
Have you forgotten the lesson I taught you?
That didn't even make that much sense in English.