Are (Verb+べく) combos considered to be adverbial phrases?


In sentences that involve (Verb + べく) combinations, as in:

> 身近な人間は(なるべく)避けたほうがいいな…
>
> As for people close to me, (as much as possible) it's best to avoid them..

> (勉強すべく)図書館に行った。
>
> I went to the library (in order to study).

Are these phrases considered to form adverbs? E.g.

  1. (なるべく) is an adverbial phrase that modifies いい.
  2. (勉強すべく) is an adverbial phrase that modifies 行った.

If not, is there an official term which describes them better than 副詞?




The auxiliary べき is inflected like a Classical _-i_ adjective. Or I guess,
more historically accurately, as a Classical _-ki_ adjective.

_(Note: This was introduced to me using the adnominal_ -ki _form. Other
materials might start from the terminal / dictionary form ending in_ -shi
_instead.)_

活用形【かつようけい】 | Inflection | Form  
---|---|---  
未然形【みぜんけい】 | Irrealis / Incomplete | ---  
連用形【れんようけい】 | Continuative / Adverbial | べく  
終止形【しゅうしけい】 | Terminal / Predicative  
(also "Dictionary Form") | べし  
連体形【れんたいけい】 | Adnominal | べき  
已然形【いぜんけい】 | Realis / Conditional | べけれ  
命令形【めいれいけい】 | Imperative | ---  
  
  * _Note: Many Japanese grammars include a_ mizenkei _for adjectives, as this is the canonical conjugation for verbs for constructing the negative. However, for adjectives, the negative simply comes after the adverbial, and moreover it is clearly separable as you can insert a particle between the adverbial ～く and the following ない._

Since べく is clearly the adverbial conjugation, yes, such phrases are
syntactically and grammatically adverbial.

* * *

_PS: Can anyone help file a bug report for how the furigana are not working
when included within a table?_




The auxiliary べき is inflected like a Classical _-i_ adjective. Or I guess,
more historically accurately, as a Classical _-ki_ adjective.

_(Note: This was introduced to me using the adnominal_ -ki _form. Other
materials might start from the terminal / dictionary form ending in_ -shi
_instead.)_

活用形【かつようけい】 | Inflection | Form  
---|---|---  
未然形【みぜんけい】 | Irrealis / Incomplete | ---  
連用形【れんようけい】 | Continuative / Adverbial | べく  
終止形【しゅうしけい】 | Terminal / Predicative  
(also "Dictionary Form") | べし  
連体形【れんたいけい】 | Adnominal | べき  
已然形【いぜんけい】 | Realis / Conditional | べけれ  
命令形【めいれいけい】 | Imperative | ---  
  
  * _Note: Many Japanese grammars include a_ mizenkei _for adjectives, as this is the canonical conjugation for verbs for constructing the negative. However, for adjectives, the negative simply comes after the adverbial, and moreover it is clearly separable as you can insert a particle between the adverbial ～く and the following ない._

Since べく is clearly the adverbial conjugation, yes, such phrases are
syntactically and grammatically adverbial.

* * *

_PS: Can anyone help file a bug report for how the furigana are not working
when included within a table?_

