请别人坐下用英文怎么说

"Please sit down"是请别人坐下的英语表达。

"Please"是英语中的礼貌用语，表示请求对方做某事。
"Sit down"则是"坐下"的意思。

例句1:
"Please sit down and make yourself comfortable."
请坐下来，让自己舒服。

例句2:
"Excuse me, but could you please sit down? The show is about to start."
不好意思，你能请坐下吗？演出快开始了。

例句3:
"Please sit down, I have something important to tell you."
请坐下，我有重要的事要告诉你。