I haven't seen you since one month ago I haven't seen you since last month.意思一样吗?

I haven't seen you since one month ago I haven't seen you since last month.意思一样吗?
I haven't seen you since one month ago I haven't seen you since last month.意思一样吗?

I haven't seen you since one month ago I haven't seen you since last month.意思一样吗?
It has been a month since I last saw you.
I haven't seen you since last month.

I haven't seen you since last month.这个对。另一个错。

第一个是中式英文的翻译，第二个对的