YOU SAID:
i dont know what to write?
INTO JAPANESE
何を書いたらいいのかわからない?
BACK INTO ENGLISH
Do not you know what to write?
INTO JAPANESE
何を書くべきかわからないのですか?
BACK INTO ENGLISH
You do not know what to write?
INTO JAPANESE
あなたは何を書くのか分からないのですか?
BACK INTO ENGLISH
You do not know what to write?
That didn't even make that much sense in English.