"? Try removing the clause. If the meaning of the sentence is still intact, it is a non-essential element requiring commas.
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hachi8Why do we need to say "This book, whose author is a woman of eighty, is amusing.", not "This book whose author is a woman~."?Try removing the clause. If the meaning of the sentence is still intact, it is a non-essential element requiring commas.
I think "who get a perfect score on the mid-term test" is essential to the meaning of the sentence above. Otherwise, the students who get very low scores would pass the course as well.
Try this one:
All students who get a perfect score on the mid-term test will pass the course.
hachi8I think "who get a perfect score on the mid-term test" is essential to the meaning of the sentence above. Otherwise, the students who get very low scores would pass the course as well.You got it!