Four years ago so fast so difficult什么意思?

Four years ago so fast so difficult什么意思? four years ago翻译成中文是什么意思? my brother left school four years ago（同义句）my brother_______school since four years age. 句型转换she left her hometown four years agoshe()()()()her hometown since four years ago four years ago 和 four years earlier 都是表示四年以前吗?一样的意思? Mrs White left America four years ago用for four years 改写句子 Thirty years or so ago什么意思? over four years ago的over什么意思 he join the party four years ago.为什么不是he join the party is four years ago? Mr Yao ______ (go) to Amecia four years ago,so he _____ (be) there for four years.My family _____ (live) in this village since I was born.The concert _____(结束） with an English song. I became a teacher four years ago.(改为同义句)I ____ ____ a teacher ____ four years . This____girl is so lovely.A.four years old B.four-years-girl C.four-year-old D.six-months-old four years Four Years 译：four score and seven years ago...four score and seven years ago,our fathers brought foth on this continent a new nation Selina lived in America four years ago(对画线的部分提问：four years ago)__________ _________ Selina ______ in America? if you look at the light of the moon that reached you,the nearest star is so faraway that the light which you can see from it tonight started to travel toward you four years ago how long has lucy been a nurse ---------------------------[since 2002;four years ago]