Can I borrow a pen and paper because I’m not going to remember all these?
Do you by any chance have a pen and paper that I can borrow for me to take down notes?
Is it possible for you to lend me a pen and paper because I’m afraid I’m going to forget everything?
(1) Can I borrow a pen and paper because I’m not going to remember all these
「全部覚えられないからペンと紙貸して？」
’Can I please ~’ とすればより丁寧な言い方になります。
(2) Do you by any chance have a pen and paper that I can borrow for me to take down notes?
‘do you by any chance have 〇〇’ = 「今〇〇持ってたりする？」
「これを書き移すために借りれるペンと紙を今持ってたりする？」というニュアンスの訳例です。
(3) Is it possible for you to lend me a pen and paper because I’m afraid I’m going to forget everything
「これを覚えられる自信がないからペンと紙貸してもらえる？」
日本 
