The given sentence is ‘did you hear him he whispered’
To punctuate it properly, we need to do the following –
Make the first letter capital.
Put the direct speech in the quotation.
Put a correct sign at the end of direct speech.
A full stop at the end and a comma after the direst speech end.
After doing the following, the required sentence will be – “Did you hear him?”, he whispered.
Final Answer: “Did you hear him?”, he whispered.