The "do" auxiliary is inserted in most cases when the question entails subject/verb inversion. ". "What makes you ...
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The "do" auxiliary is inserted in most cases when the question entails subject/verb inversion. For example, "He likes her." -> "Why does he like her?". "What makes you ... ?" does not entail any inversion; grammatically it has the structure of "He likes her", i.e. subject-verb-object, just that the subject is a question word.
To put it another way, you never use an auxiliary or have subject-verb inversion when the question word functions as either the subject of the sentence or subject complement.
What did happen?
What happened?
This happened.
Who does work here?
Who works here?
John
JigneshbharatiI thought "what does make you so..." is correct.
It would be correct if 'make' was the subject, 'you' the main verb and 'so confident' an adverbial phrase!
JigneshbharatiI thought "what does make you so..." is correct?
By the way, this would be correct if you need the emphasis of "does". For example:
A: Is it X that makes you so confident?
B: No, it's not that.
A: Well then, what does make you so confident?