"暑假过得真愉快" 可以用英文表达为 "I had a great summer vacation."

"Summer vacation" 是指暑假，而 "had a great" 是指过得很好。

这句话的来源是英文中最常用的一种表达方式，即在谈论过去的某个时间段时使用 "had a" 来表示过得如何。例如：

I had a great time at the party. (我在聚会上过得很愉快。)
She had a terrible cold last week. (她上周感冒得很厉害。)

其他一些可以用来表示过得好或坏的词语包括：good, bad, fun, enjoyable, boring, terrible 等。例如：

We had a good trip to the beach. (我们去海滩的旅行过得很好。)
The movie was really boring. I had a terrible time. (这部电影很无聊。我真的过得很糟糕。)