I and my friend are doing an English exercise which requires us to make a sentence with the phrase "for which reason(s)"
I have made this sentence:
- I left my home village yesterday, for which reason my father is sad now.
However, my friend looked at my sentence and told me it should be changed to:
- I left my home village yesterday, which is why my father is sad now.
He said "for which reason(s)" is used at the beginning of the interrogative sentence like:
- For which reasons do you buy a smartphone?
or after a verb:
- I want to understand for which reason the shipping cost has increased.
Could you please advise me as to whether my sentence #1 is correct or not?