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Is "be something to be doing" grammatically correct?

From this book "Deep Learning and Convolutional Neural Networks for Medical Image Computing"

What have been the impediments to realizing the full potential of medical imaging CAD? There have been a number of difficulties.

Is "the impediments to realizing" grammatically correct? I don't think so, but this is a formally published book by Springer, so I need a double check.

  • Your question says, "be something to be doing," but there is no second be in your quote. The sentence structure used here is: "What is the noun to gerund". – J.R. Jul 17 at 11:15
  • Thanks for your reminder. I've updated my post. So noun to gerund here is grammatical and idiomatic, right? – user98358 Jul 17 at 11:43
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    yaojp: The advantage to asking questions on ELL is that people sometimes give examples that make it easier for you to understand things. – FumbleFingers Jul 17 at 12:27
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Yes, this is fine. It might help to look at the structure as:

(What have been) (the impediments) (to realising the full potential) (of...)

I suspect that you are mis-understanding what 'realising' means in this context.

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