I am not just talking about what ,all question words included. The question is vague, so there is no simple single answer, but if the preposition precedes, it is generally more formal.
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onur2695I mean in which order should I place the preposition and the question word?I am not just talking about what ,all question words included.The question is vague, so there is no simple single answer, but if the preposition precedes, it is generally more formal.
onur2695For what - What for ?It seems to me that "For what?" is mostly used when expressing regret about wasted effort.