Is it correct to say: The city is difficult to turn into an economic center. OR it must be: It is difficult to turn the city into an economic center. Thank you.

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    Possible duplicate of To infinitive used after adjective, which addresses tough-movement and includes 'difficult' as a tough-adjective. See also Wikipedia. – Edwin Ashworth Jun 7 '19 at 14:16
  • Both are correct. They are simply the result of different rules. The first is an example of Tough-movement, and the second is an example of Extraposition. Both of these are syntactic rules employed to avoid saying the basic sentence, which is To turn the city into an economic center is difficult. This sentence has a heavy subject, and the main predicate is the last word; English does not like this kind of sentence and has rules to change them into more agreeable shapes. – John Lawler Jun 7 '19 at 14:18

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