C1
This is the first time + S + have + V3 · the + Adj-est + N + S + have ever + V3
最高级之后和 this is the first time 之后的现在完成时
讲解
在 this is the first time、that is the only 以及最高级之后，后面的从句必须用现在完成时，尽管中文里没有这种时态变化。若说的是过去，则两部分都要变：that was the first time + had V3。 常见错误：不能用一般现在时：This is the first time I fly alone ✗, I have flown alone ✓.
例句
This is the first time I have flown alone.
这是我第一次独自坐飞机。
It is the best film I have ever seen.
这是我看过的最好的电影。
That was the first time she had spoken in public.
那是她第一次公开演讲。
This is the only report that has been signed.
这是唯一一份已签字的报告。
练习
通过选择题测试你的掌握程度
高效学习“This is the first time + S + have + V3 · the + Adj-est + N + S + have ever + V3”
语法点“This is the first time + S + have + V3 · the + Adj-est + N + S + have ever + V3”（最高级之后和 this is the first time 之后的现在完成时）是 CEFR 5 级别的重要结构之一。要熟练运用这个结构，你需要弄清楚它的使用语境，并经常练习。
学习小贴士：把例句大声朗读多遍，培养自然的语感反应。然后试着结合自己的生活情境造句。用发音按钮听标准发音并跟着练习。
你也可以查看完整课程“”，更深入地了解相关的语法和词汇。