I came across the sentence "Why + noun phrase?".
This construction is not quite clear to me because it doesn't have a verb.
britannica.com:
(1a) Why the hurry?
What is the full version of (1a)? (I mean, without ellipsis)
my variant:
(1b) Why is the hurry?
What is the difference between (1a) and (1b)?
my own example, № (2):
A: Buy some food and beer.
B: Why beer? I don't drink alcohol.
Am I using "Why + NP?" correctly here? If not, then why not?
Am I right that "Why beer?" means "Why would I buy some beer?" ?
Can we also use "Why + adjective phrase?" ?
my own example, № (3):
A: This book is interesting.
B: Why interesting?
Is (3) correct? If not, then why not?
Am I right that "Why interesting?" means "Why is this book interesting?" ?
Can we also use "Why + adverb phrase?" ?
my own example, № (4):
A: We need to drive fast.
B: Why fast?
A: To be there in time.
Is (4) correct? If not, then why not?
Am I right that "Why fast?" means "Why do we need to drive fast?" ?