"Have a great time at the party" 是表达祝愿在聚会上玩得开心的常用说法。
其中 "have a great time" 是一个固定搭配，意思是玩得高兴。 "at the party" 则表示在哪里玩得高兴。
例句：
"I hope you have a great time at the party tonight." (我希望你今晚在聚会上玩得开心。)
"Enjoy yourself at the party, and have a great time!" (在聚会上享受自己的时光，玩得高兴！)
"Have fun and have a great time at the party, Sarah!" (玩得开心，莎拉，在聚会上玩得高兴！)