*What class did you fall asleep during?
*What did you leave the book now?
*What did they leave notwithstanding?
*What time did John arrive at?
They say they are all ungrammatical.
Would you correct the sentences?
What I tried to do is this:
During what class did you fall asleep?
Now what did you leave the book (???) ? I have no clue.
Notwithstanding what did they leave?
At what time did John arrive?
KeunChulLee *What class did you fall asleep during? It is possible that someone might use this sentence in informal speech, but it looks a bit awkward in writing. " seems better to me.
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KeunChulLee*What class did you fall asleep during?
It is possible that someone might use this sentence in informal speech, but it looks a bit awkward in writing. Your suggestion of "During what class did you fall asleep?" is a preferable word order in formal English, though "During which class did you fall asleep?" seems better to me.