It's about ten years since I ____ in Australia.为什么用have been.一般我们初中常见的都是 现在完成时 + since + 过去的某个时间点...所以不是很明白这句话,如果用arrived 为啥不行.或者具体说一下since的用

It's been five or ten years from happenning for about 50 years怎么翻译呀? You bought the car about ten years ago? Yes. Although it's old, it still runs well.翻译 是at about ten years 还是for about ten years it's been ten years 为什么不加for It's ____ half past ten填介词,是不是about? It's about ten( ) walk from here to the school It's about ten at night.Time to__.一个空 how long have you( its about ten years since we( ) a married,narriedb been married,were married c.got married,got married d.been married,got married The man has been dead for ten years(同义句） It”s ten years__the man__ Only ten minutes, but, it's ten most close time in these years.什么意思 It is about ten years I met you lastIt is about ten years I met you last A since B for C when D as It is about ten years __________ I met you last.A.since what's your ------（ predict） about your life in ten years填空 how far is it from here?-about ----------walk.A.ten minute's B.ten minutesC.ten minutes'D.ten minutes's说为何选C,并翻译题目. It's about ________ walk from my home．大神们帮帮忙A.ten minute B.ten minutes' C.ten minute's D.ten-minutes it;s ten o' it's ten yuan It's ten past