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からというものは and 以来, both appear to share the meaning of "after that event, the
state did not chage. It's always the same". Can someone help me to understand
the difference?
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2019-06-25T13:21:43.467
69080
2019-06-26T02:08:27.233
25880
question
grammar
Difference between (て)からというものは and (て)以来？
* 以来 is a relatively simple objective term, "since ～ (, something has been ...)". ～からというもの sounds more dramatic and emphatic, " _ever_ since ～". According to BCCWJ, 以来 is over 30 times more common than からというもの.
  * ～からというもの only follows それ/あれ and the te-form of a verb. 以来 can directly follow a noun, too. 

> あの事故以来、よく眠れません。  
>  [×] あの事故からというもの、よく眠れません。 ← wrong

  * ～からというもの can optionally be followed by the topic marker は. 以来 cannot.
  * 以来 also works as a no-adjective.

> 2015年以来の安値  
>  the lowest price since 2015
>
> 彼を見るのは2月以来だ。  
>  This is the first time I see him after February.
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2019-06-26T02:02:59.920
69092
2019-06-26T02:08:27.233
2019-06-26T02:08:27.233
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answer