You know the thing you showed me yesterday? Could I have it?
Yesterday, you showed me ～, didn't you? Could you give it to me now?
「昨日見せてもらった物、貰えませんか」＝ Could I have the thing you showed me yesterday? / You know the thing you showed me yesterday? Could I have it? / Yesterday, you showed me ～, didn't you? Could you give it to me now?
ボキャブラリー
「昨日」＝ yesterday
「見せる」＝ show
「物」＝ thing
「貰えませんか」＝ Could I have ～？/Could you give me ～？
イギリス 
