"買菜"在英語中可以表示為 "grocery shopping" 或 "food shopping"。

砍價可以表示為 "haggle"。

要表達 "能不能便宜一點" 的請求可以使用以下英語表達方式：Can you make it cheaper? Could you give me a discount? Is there any room for a lower price? Would it be possible to get a better deal? Can you offer a lower price? Is there a discount available? Could you do me a favor and reduce the price a bit?