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

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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
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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 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的用法

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
常见的：It has been about ten years since I arrived in Australia.
所以用Arrived是正确的
但是如果不用动词arrive,而用be,则要说since I have been ...
原句里面的It's about ten years 严格地说应该是 It's been about ten years...It's been = It has been
since 用法
prep./conj.1.自从 2.因为 ad.从那以后
副词 adv.从那时以来
from then until now
· I saw him in June,but we haven't met since.
我在六月见到过他,从那以后我们未见过面.
· He has looked for a job ever since.
他打那一直在找工作.
副词 adv.过去至现在的一段时间
at the same time between then and now
· Mr.Li was ill last week but has since recovered.
李先生上星期病了,后来就痊愈了.
副词 adv.以前；在现在以前
ago; before now
· The word has long since been out of use.
此字老早以前就无人使用了.
· ever since
从那时起一直到现在
· Jack went to Canada in 1974 and has lived there ever since.
杰克于一九七四年去加拿大,从那时起到现在一直住在那里.
连词 conj.从…以来；…以后
from the time when
· What have you been doing since I saw you last?
自从我上次看到你以来,你做什么了?
· He has been in the army since he left school.
他离开学校以来一直在部队里.
· He has devoted himself to teaching since he graduated from the college in 1962.
他一九六二年大学毕业以后一直献身教学工作.
连词 conj.因为；既然
because; as
· Since I have no money,I can't buy any food.
因为我没钱,所以不能买任何食品.
· We don't know much about the appearance of the surface of Antarctica,since it is covered with ice more than two miles thick in some places.
我们对南极洲的地面形状了解不多,因为在这个洲有些地面覆盖着两英里多厚的冰层.
· Since we're League members,we should set a good example to others.
即然我们是团员,我们就应该给别人做个好榜样.
· Since we have no money,it's no good thinking about a holiday.
既然我们没有钱,考虑度假有什么用.
介词 prep.从…以来；自从
in all the time after
· She has been ill since last Sunday.
上星期日以来,她一直在生病.
· He has eaten nothing since yesterday.
自从昨天以来他没吃过东西.
· Since my last letter I have heard from him twice.
自从我上次写信给他以后,我已经收到他两封信了.

since 用法
prep./conj.1.自从 2.因为 ad. 从那以后
副词 adv. 从那时以来
from then until now
· I saw him in June,but we haven't met since.
我在六月见到过他，从那以后我们未见过面。
· He has looked for a job ever since.
他打那一直在找工作。

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