Warning: Dangerous bend ahead
English has a well-defined set of question words. In brief, we claim all of them can be expanded into a what phrase. To demonstrate:
- what ::= what
- who ::= what be the actor of/that
- when ::= what be the time of
- where ::= what be the location of
- how ::= what be the way of
- which ::= what be the choice of
- whose ::= what be the owner of
- why ::= what be the reason of