over four years ago的over什么意思

over four years ago的over什么意思 four years,over over 100 years ago years ago和over the years用什么时态 they came here over ten years ago的同义句 over 80 years ago的同义句是什么 Over thirty years ago he left his hometown .Over 可以换成什么 walk over的over什么意思? 请问over the years 的意思 over last 50 years的意思? for over four years是什么时态 over a hundred years ago 中over是什么词性?