Recently I am reading 走れメロス, and there is a sentence pattern that I am not
familiar with (Group 2). Compare the following sentence groups:

Group 1

> > 訪ねて行くのが楽しみである。
>>

>> 疑うのが、正当の心構えなのだと、わしに教えてくれたのは、おまえたちだ。

Group 2

> > 自惚れているがよい。
>>

>> その身代りを呼ぶがよい。

>>

>> 勝手にするがよい。

There is a nominalizer の before the verb in Group 1's sentences, whereas it
doesn't in Group 2's. I am aware that it is always plain verb followed by
"がよい" in the text, but what does "plain-verb がよい"exactly mean? Does the
meaning remain natural or the same if a nominalizer (say, の) is added? (Though
I speculate "plain-verb がよい" approximates its volitional counterpart, but I am
not sure).

Furthermore, can "plain-verb が" followed by other kinds of 述語 rather than
"良い"? Is "plain-verb がよい" still used in modern Japanese? If so, would you use
it personally in everyday life, hear it from other people's utterance, or the
sentence pattern is more likely to be used in a play script spoken by actors?

It is my first time to see this sentence structure, so I have many doubts.
Would you tell me as much as you know about this sentence pattern?
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2018-12-31T02:22:22.647
64661
2022-08-01T01:31:05.193
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question
syntax cleft-sentences
Plain Verb followed by がよい
In archaic Japanese, there was no such thing as a nominalizer. Instead, the
連体形 (or attributive form, noun-modifying form) of a verb was used to
nominalize a verb. We can still see an attributive form used as a noun in
proverbs and idioms, for example
[逃げるが勝ち](http://jisho.org/search/%E9%80%83%E3%81%92%E3%82%8B%E3%81%8C%E5%8B%9D%E3%81%A1)
("Running is winning") and
[聞くは一時の恥](http://jisho.org/word/%E8%81%9E%E3%81%8F%E3%81%AF%E4%B8%80%E6%99%82%E3%81%AE%E6%81%A5%E8%81%9E%E3%81%8B%E3%81%AC%E3%81%AF%E6%9C%AB%E4%BB%A3%E3%81%AE%E6%81%A5)
("Asking is a one-time shame").

～するがよい uses the same grammar. This ～がよい is a part of role language used almost
exclusively in fiction by archaic demon, samurai, noble people, etc. It sounds
fairly old-fashioned and pompous. The negative counterpart is
[～するでない](https://japanese.stackexchange.com/q/33807/5010) (e.g., 呼ぶでない = Call
not).
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2019-01-01T06:32:25.533
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2022-08-01T01:31:05.193
2022-08-01T01:31:05.193
5010
5010
64661
answer