YOU SAID:
I don't know any sentences
INTO JAPANESE
私は文章を知らない
BACK INTO ENGLISH
I don't know the sentences.
INTO JAPANESE
私は文章を知らない。
BACK INTO ENGLISH
I don't know the sentence.
INTO JAPANESE
私は文を知らない。
BACK INTO ENGLISH
I don't know the sentence.
That didn't even make that much sense in English.