
Hi, Look at the following sentence: For example, when, on entering her son’s untidy room, a mother says to her son I love children who keep their rooms clean, she may be simply alluding to her expectation or desire for her son to clean up his room. My question is: Should I put a comma after 'room', since I am using 'on entering her son's untidy room' in a restrictive sense? I suppose the comma is not needed but what do you natives think?
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