” All the above sentences are correct. BUT "Who is the culprit'? "
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Vincent Teo"Do you know who the culprit is?”
WHICH is correct:
“Do you know who is the culprit?” or “Do you know who the culprit is?”
“Do you know who am I?” or “Do you know who I am?”
“Do you know where is he?” or “Do you know where he is?”