I'd like to know which is more natural, (1) or (2) / (3) or ((4).
A: I'm going home.
B: (1). Why? (2). What for?
(3). He is injured in an accident.
(4). He is injured because of an accident.
Thank you in advance.
'Why' and 'what for' and 'how come' are all acceptable and natural. The last two are less formal.
'He was injured in an accident' is more natural.