前年暑假用英文怎么说

前年暑假的英语表达方式是 "the summer before last".

它的来源是通过将时间关系短语 "before last" 加在 "summer" 之前，表示 "the summer two years ago" 的意思。

以下是一些英文例句及其中文翻译：

I went on vacation to Hawaii the summer before last.
(前年暑假我去了夏威夷度假。)
I remember going to the beach the summer before last.
(我记得前年暑假我去过海滩。)
I had a great time at the lake the summer before last.
(前年暑假我在湖边玩得很开心。)