YOU SAID:
Will I understand someday?
INTO JAPANESE
私はいつか理解しますか?
BACK INTO ENGLISH
When will I understand?
INTO JAPANESE
いつ理解できますか?
BACK INTO ENGLISH
When can you understand?
INTO JAPANESE
いつ理解できますか?
BACK INTO ENGLISH
When can you understand?
That didn't even make that much sense in English.