Let's say there are daily interest rates available for calculation but I am not sure which date's interest rates to use. What would be an appropriate question in this situation?
Of which date's interest rate should I use?
Which date's interest rate should I use?
What date's interest rate should I use?
Or better options.
Thanks in advance!
Best Answer
This is ungrammatical. To begin the question with the preposition, you could say "Of which date should I use the interest rate?" This is, however, hopelessly stuffy sounding. Even if you want to sound stuffy, this is difficult to understand and should be avoided.
This is a reasonable choice.
This isn't as good, but it wouldn't be surprising to hear a native speaker utter this question.
In some contexts, it might make sense to make the question longer. For example, you might ask Which date should I use for the interest rate? In other contexts, you might be able to make the question shorter, as in Which date should I use?