You should have told me so before.

你早该告诉我的。

《牛津词典》

You might have told me that before!

你以前就该告诉我这件事！

《柯林斯英汉双解大词典》

I have told them with absolute certainty there'll be no change of policy.

我十分确定地告诉他们政策不会有变。

《柯林斯英汉双解大词典》

I promise that what I have told you today is true C cross my heart.

VOA: special.2010.07.11

when you could have told me 6 months ago.

其实你们本可以六个月前告诉我的。

这里的快乐时光 - SpeakingMax英语口语达人

Can't have told that perfectly that story I'm sure so any questions?

我觉得我没有把这个事情讲得很完美,那么有什么问题吗？

哈佛公开课 - 计算机科学课程节选

The Neanderthals may have told each other stories about the life that their dead companion now enjoyed.

NPR: Karen Armstrong: Myths and the Modern World

"Doctors have told me that my prognosis for recovery is very good, " he said.

WSJ: Former Bills QB Kelly battling cancer of the jaw

Peggy Paul said some Ron Paul supporters have told the family they framed their cookbooks.

WSJ: Fed Critic Ron Paul Opens Door to Food Critics in Political Cookbook