Question

In order to set apart a nonessential element in the middle of a sentence, the comma(s) must____.

A. not be used to set apart a nonessential element
B.be placed before the nonessential element
C.be placed after the nonessential element
D.be placed both before and after the nonessential element

Answer 1

In order to set apart a nonessential element in the middle of a sentence, the commas must D. be placed both before and after the nonessential element.
For example:
Jon, my friend, likes to swim.
The appositive phrase my friend is nonessential here.