Mr. Hunt is..quite correct in saying that [etc.]
Trying to open a safe without knowing the correct combination.
Having made a mistake..he went back and corrected it.
She has corrected the mistakes in the report.她修改了报告里的错误。
The correction of the report took her three hours.她用了三个小时来修正报告中的错误。
I am not sure the correctness of this point.我不确定这个观点的正确性。