Since I came here, I have discovered something else interesting.

自从我来到这里，我还发现了其他有趣的事情。

youdao

It is nearly two years since I came here.

我来这儿快两年了。

《新英汉大辞典》

It has been raining since I came here.

自从我来这里以来，一直在下著雨。

youdao

"We are prepared to go to Nigeria. We have been talking about Nigeria since two years ago when I came over here,"

VOA: standard.2009.10.22

"One is that he wants to play for us and the second is that I still hope Nigeria will acknowledge how much we have done at Arsenal to restore their top player since he came here, " Wenger said.

BBC: Kanu asked to broker peace deal