作业帮The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.as as to都有哪些意思呢~本句中的as 是“以至于”的意思吗，只能这么理解了~
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The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.as as to都有哪些意思呢~本句中的as 是“以至于”的意思吗，只能这么理解了~
The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.
as as to都有哪些意思呢~
本句中的as 是“以至于”的意思吗，只能这么理解了~
The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.as as to都有哪些意思呢~本句中的as 是“以至于”的意思吗，只能这么理解了~
as to
1)表示涉及某点：as to常放于句中,表示“关于……方面”、“有关……之事”,但为了突出要提及的人或事之时,也可将as to置于句首,以示强调.但只涉及内容,而不涉及讲话人的态度.例如：
①His wife,an old teacher,has no complaint as to salary．
②As to your ability to overfulfil the target,I never had the slightest doubt．
2)用以重提旧事：as to引出的内容都是前文曾经提到过的或者谈话对方都有所了解的,表示“说到”之义.,例如：
①As to doing that,I haven't decided yet．
②As to the question you raised in your last letter,I think that it is unanswerable．
3)用于提出问题：as to必须位于句中,前面出现的大都是表达某种心理活动的动词,形容词或名词,其后引接出wh-clause或who-to-v结构,表示“在……的问题上”、“就……问题来讲”,所引出的问题都有很强的针对性.但有人认为这里的罄to显得多余,去之亦通.所以,有时也不必译出.例如：
①There is some doubt as to whether the proposal is practicable．
②I enquired of the clerk as to which documents were needed．
4)引出做事的依据：as to还有“按照”、“根据”的含义,而as for则无此义.例如：
①The shoes are correctly placed on the shelf as to size and colour．
②The items on the agenda are listed as to order of importance．
综上所述,as for 和 as to在确切含义的表达和具体用法上都是有很大差别的,不能将二者混为一谈.
so long ...... as to constitute a tradition.