If I say, "How did she knew about it?" Would it be correct? If you use search engine for "did knew", you get hundred thousand results. Are they incorrect? I'm confused about this grammar structure.
closed as general reference by RegDwighт♦ May 5 '12 at 12:50
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No, it is incorrect. The sentence should read "How did she know about it?", although probably the sentence "How did she get to know about it?" would sound more natural.
I think you should look the structure up in a common grammar book.