have since been 和 have been since

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have since been 和 have been since

have since been 和 have been since
have since been 和 have been since

have since been 和 have been since
应该是二者的词性不同吧：have since been 中的since是副词,修饰have been.
但是have been since中的since是个连词,它后面必须要接点什么东西.
eg：the building has since been under constuction .
the building has been under construction since 2009.(接了时间点）

have since been 中的since adv.副词 其后，后来 做状语修饰谓语动词be
The fish, which has since been sent to a museum where it is being examined by a scientist, is called an oarfish."
"这条后来被送到一个博物馆,在那里接受一位科学家的观察...

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have since been 中的since adv.副词 其后，后来 做状语修饰谓语动词be
The fish, which has since been sent to a museum where it is being examined by a scientist, is called an oarfish."
"这条后来被送到一个博物馆,在那里接受一位科学家的观察、研究的鱼,名叫皇带鱼。"
而 have been since.中的since 为介词后应跟表示时间的词。如。I have been here since last year.

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have since been 和 have been since I have been collected shells since Isaw her.和I have been collecting shells since I saw her哪个对? have gone to/have been to和have been in能不能与for.since连用 可以用于现在完成时吗 I HAVE BEEN HERE SINCE TIME have been here 后面可不可以用since i have been skating since nine years have done for/since和have been doing for/since区别i have lived in us for 2 months i have been living in us for 2 months i have lived in us since 2 months agoi have been living in us since 2 months ago小弟实在是没财富 只能说声谢谢 have done for/since和have been doing for/since区别i have lived in us for 2 months i have been living in us for 2 months i have lived in us since 2 months agoi have been living in us since 2 months ago小弟实在没财富 对不起啊, Mary and Rose_____friends since they met in2000.A.have made B.have been C.made D.have become?become been 和made的区别是什么? 用have been to和have gone to,have been in填空1.John____________England since he came back .2.How many times_____you_____shanghai. since前用have done 还是have been done have worked in this school since 2000请问这句和have been working here since 2001意思是不是一样的? I have been sick since yesterday.中have been 是什么是时态为什么要用been. I have been in CZ since last year.这话对么?been in后可加since吗 I have lived here since then还是I have been here since then对啊? have been to这里的have 这里have been是延续性动词吗?have been to后能跟for和since引导的时间状语从句吗?I _________the north for a year.这里填have been to 为什么?have been to与have been in如何辨别 have been 和have ever been区别! I have been here since I was born 和I haden't seen him since he left NANJING.两句话为什么用的不是相同的时态?