• Please explain what is this? or
  • Please explain what this is?

Which one is grammatically correct?


2 Answers 2


Your sentence, despite ending with a question mark (a period would be more correct), is an imperative sentence: "(You) please explain..."

Therefore, the noun comes before the verb and you say "Please explain what this is."


Please explain what this is? -

  • Please explain what this is is COMPLETELY CORRECT. The alternative sequence is "technically incorrect" even though it's not uncommon among native speakers (and I'd say it's actually far more common among certain classes of non-native speakers). Oct 3, 2019 at 17:52
  • ok, I see, I edited it Oct 3, 2019 at 17:54
  • If you are going to post an answer, you need more than to just echo part of the question. Please state your reasoning and quote sources to justify it it possible. And why, in this case, the OP's alternative is not correct. Oct 13, 2019 at 9:27

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