"If you would just listen for a moment…"
"If you would listen just for a moment…"
Subtly different meanings, but in both cases 'just' is adverbial. In the first sentence, 'just' modifies listen. In the second, I think the whole phrase 'just for a moment' is adverbial, but no matter. 'Just' is moving around as you would expect from an adverb.
But what about "If you would listen for just a moment…"
'Just' is no longer modifying 'listen'. It isn't behaving like an adjective, it doesn't really modify 'a moment'. Yes, we can call it an adverb, given that 'adverb' is a bit of a catch-all category. But what is it really, what is it doing, what is it modifying? It doesn't really modify anything specific, it modifies the whole situation. It's more like a kind of intensifier or attitudinal word.
Does someone have a clear grammatical or linguistic analysis of this situation?
Best Answer
That's not quite right, but I think I see what you're getting at.
The Cambridge Grammar of the English Language (CGEL) treats just as an adverb, and says that it functions in this case as a "focusing modifier", meaning that it applies semantically to an element that's then called the "focus". This may be what's leading you astray; in an example like "I just need one of them", just is syntactically modifying the verb phrase "need one of them", but semantically it clearly applies only to "one of them" or "one". Your example isn't a very compelling one IMHO — I think that "a moment" is both the (syntactic) head and the (semantic) focus — but I guess you're interpreting the focus to be "you would listen for a moment"?
Incidentally, the CGEL points out that although focusing modifiers can modify complete noun phrases, as in "just a moment", they can't modify a noun or nominal that's only part of a noun phrase, as in *"a just moment". This helps justify the "adverb" classification. (Of course, there's also an adjective just meaning "fair", and "a just moment" is possible with that sense.)
(Source: the Cambridge Grammar of the English Language, chapter 6, §7.3 "Focusing modifiers", pp. 586–7.)