"if it works" and "does it work" phrase differences
https://ell.stackexchange.com/questions/59777/if-it-works-and-does-it-work-phrase-differences
WEBJun 20, 2015 · In 1, "does it work" is a complete question, also known as an interrogative clause. Notice the inversion of "it" and "does," which are the subject and the modal auxiliary verb, respectively. This is a sure sign of a question. In this form, it needs to stand by itself: "Does it work?"
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