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Context: "If what you scream can’t be heard over the distance, they don’t know to come and rescue you."

"don’t know to come" sounds weird to me. Is it slang or simply misuse?

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  • Where did you find this sentence?
    – fev
    Commented Jun 6, 2021 at 18:50
  • @fev a manuscript I've been given, written by an American woman, presumably senior.
    – Diane Mik
    Commented Jun 6, 2021 at 18:53

1 Answer 1

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If you know to do something, you know that it needs to be done. Very common in British and American English.

Does he know to come here (= that he should come here) first?

Know (verb) (Oxford Learner's Dictionaries)

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