主句应该是现在完成时。可以用since 3 weeks ago.
http://forum.wordreference.com/threads/weve-been-living-here-since-about-eight-years-ago.320770/
我也不太懂啊。:)
http://forum.wordreference.com/threads/weve-been-living-here-since-about-eight-years-ago.320770/
我也不太懂啊。:)