- Please explain what is this?
or- Please explain what this is?
Which one is grammatically correct?
Answer
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.”
Attribution
Source : Link , Question Author : mayday445 , Answer Author : PlutoThePlanet