I have been there since a month ago.

去过，我一个月前去的。

youdao

Japan has been shaken by more than 400 strong aftershocks since the earthquake and tsunami hit a month ago.

自从一个月以前的地震和海啸以来，日本已经遭受了超过400次的余震。

youdao

In the flow of adverse publicity since police raided 30 of its offices a month ago, Siemens has tried to show that it is taking appropriate action.

自一个月前警方突然搜查西门子的三十间办公室以来，西门子公司不断身陷负面新闻。

youdao

Relations between the two Koreas have deteriorated steadily since the Cheonan, a South Korean naval vessel in the Yellow Sea, exploded a month ago, killing 46 crew members.

VOA: standard.2010.05.26

Residents of New Orleans East gathered in a shopping center mall early Friday morning, determined to return to their homes for a first look since Hurricane Katrina hit a month ago.

NPR: A Return to New Orleans East

"We have continued to review the performance of individual stores since our appointment a month ago and have concluded that further closures are necessary in order to restructure the company for sale, " Lee Manning, joint administrator at Deloitte, said.

BBC: Blockbuster to close 164 more UK stores

Chavez, 58, has not made a public appearance since doctors operated on him a month ago.

CNN: Venezuela says Chavez is improving