Are both sentences OK?
If it hasn't happened by now, it's not going to.
If it hasn't happened by now, it's never to.

Question

Are both sentences OK?
If it hasn't happened by now, it's not going to.
  If it hasn't happened by now, it's never to.

Answer

Sentence #1 is correct.  Sentence #2 could also say, "It it hasn't happened by now, it's never going to." or "... it's never going to happen." or, as stated before "... it never will."

Answer

Hi. Sentence #1 is good. However, sentence #2 can be changed to "If it hasn't happened by now, it never will."

Answer

The first sentence is correct. The second sentence 'If it hasn't happened by now, it's never to.' is not correct as 'it's never to' is a broken sentence.

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