pro-form

The original is no good in AmE, though it may occur in BrE. I would expect this as natural:

He has never sung in Seoul, but he has done so in Busan.

Here, 'done so' = 'sung'.

Hi,

Reading a grammar textbook, I've found this example in the chapter of pro-forms.

e.g. He has never sung in Seoul and he has done in Busan.

And it is not clear of the extent replaced by 'done'.
That is the question of whether 'never' is included or not.

1. ......he has never sung in Busan.
2.

Thank you all for the answers,

Firstly, guessing from your answer, 'never' seems to not be the part of the verb phrase.
Then it must be the immediate node of the sentence level. Is it right?

And it is so interesting to know that 'do so' is the most widely used form between the two of them - do so and do.

Lastly, if the word 'usually' is there, does it have still to b

Hi again,

Firstly, guessing from your answer, 'never' seems to not be the part of the verb phrase.
Then it must be the immediate node of the sentence level. Is it right? Sorry, I don't know what that terminology means.

He has done so in Busan means he has sung in Bus

cho7712He has never sung in Seoul, as he has done in Busan.

Isn't this what you mean?

Anyway, done replaces sung. The pro-form can't replace the accompanying negation.

CJ

Thank you for the answers.

The original example was rather changed and suggested here for the purpose of highlighting the pro-form.
However all the native teachers pointed out the meaning of it . So I again reconsider how it is important to use language authentically.

And about the matter of including the adverb into the verb pharse, it seems the adverb is always not recovera

cho7712it seems the adverb is always not not always recoverable

True. The adverb is not always recoverable.

CJ

Thank you for the answer. It is of much help.