开个惊喜晚会用英文怎么说

"Surprise party" 是英文中表示"开个惊喜晚会"的常用说法。这个短语源自英语中的 "surprise" 和 "party" 两个单词。"Surprise" 意为 "惊喜"， "party" 意为 "晚会"。

例句：

"I'm throwing a surprise party for my sister's birthday." (我要为我妹妹的生日举办一个惊喜晚会)
"We're planning a surprise party for our boss's retirement." (我们正在为我们老板的退休计划一个惊喜晚会)
"I can't wait for the surprise party tonight" (我等不及今晚的惊喜晚会了)