YOU SAID:

I write the book by a pencil.

INTO JAPANESE

私はその本を鉛筆で書く。

BACK INTO ENGLISH

I write the book with a pencil.

INTO JAPANESE

私は鉛筆で本を書きます。

BACK INTO ENGLISH

I write a book with a pencil.

INTO JAPANESE

私は鉛筆で本を書きます。

BACK INTO ENGLISH

I write a book with a pencil.