Which is correct:

  1. Please let me know when WILL YOU go.
  2. Please let me know when YOU WILL go.


  1. I don't know when would he arrive.
  2. I don't know when he would arrive.

Please explain why. Thanks! :)

  • when WILL YOU go is a question. The syntax of preceding Please let me know expects to be followed by something (the thing you want to know, some kind of "noun"). And when YOU WILL go IS a noun phrase. Even native speakers (especially, relaxed or indifferently-educated ones) make this "error", but it's particularly something that non-native speakers are prone to (probably, those who speak specific languages with specific "question grammar" features). – FumbleFingers Reinstate Monica Aug 16 '19 at 17:43

"Order of words in an interrogative sentence is as follows:

Verb + subject + ............................?

When will ( Verb ) you ( subject ) come ?..-"


However, If you said it either way, any English speaker would understand you and it would be correct.

Edit: The second one of both personally sounds better to me, however I believe above is the correct way to structure it.

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