You should have seen her face when she found out!
你真该看看她发现事情真相时脸上的表情！
It's been an age since we've seen them.
我们有很长一段时间没有见到他们了。
I haven't seen him since the summer before last.
我已有两个夏天没见过他了。
That's the best movie I've seen in years.
那是我多年来看过的最好的电影。
They haven't seen each other for years.
他们彼此多年没有见面了。