在英诇中，过八十岁生日可以用 "celebrate one's 80th birthday" 来表示。
"Celebrate" 是一个动词，意思是庆祝，欢庆。"One's" 是一个形容词性物主代词，指的是某个人的。"80th" 是形容词，意思是第八十的。"Birthday" 是名词，意思是生日。
例句：
I'm going to celebrate my 80th birthday next month. (我下个月要过八十岁生日。)
My grandma is going to celebrate her 80th birthday this weekend. (我的奶奶这个周末要过八十岁生日。)
此外，你还可以用其他词汇来表达过八十岁生日，例如：
Mark the occasion of one's 80th birthday (庆祝某人八十岁生日)
Commemorate one's 80th birthday (纪念某人八十岁生日)
例句：
We're going to mark the occasion of my dad's 80th birthday with a big party. (我们要举办一个大派对来庆祝我爸爸的八十岁生日。)
We're going to commemorate my mom's 80th birthday with a small gathering of family and close friends. (我们要跟家人和亲密的朋友们小聚一下，来纪念我妈妈的八十岁生日。)