A 54-year-old woman is in a coma after fracturing her skull when she fell and hit her head on board an SMRT bus on Sunday night.
Would it be wrong if I use 'in' instead of 'on board'?
Thanks.
Yes, it's wrong. You are "on board" a bus, or a plane, etc.
Or even just "on." But "in" would sound wrong.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
'On board' a bus is not common in BrE, but it's not incorrect. Formally, we board a bus at the beginning of the journey, and alight from it at the end.
Context is always important; labelling is rarely important.