What should I know about these two expressions?
I have two expressions but I do not know which one is correct and which one should I use. Above all what is the difference?

  1. I am not the one writing the function.
  2. I am not who writes the function

And why in the first case we are using the -ing form and also is so strange to see the 'one' followed by that -ing form, what am I missing?

  • (1) refers to the function being written, only, and says you are not the one writing it. (2) refers to every function and says you are not the one who writes any of them. Jun 15 at 21:54
  • 2. is ungrammatical. "Who" cannot be used like this in a fused relative construction.
    – BillJ
    Jun 16 at 6:47
  • what do you mean by saying it cannot be used like that? how should i use it?
    – Marco Borzumati
    Jun 16 at 7:14
  • thanks , but jhon could you be more precise? I mean, if i had to write as the first example does i am not sure whether i would be really sure that is corrrect or not,
    – Marco Borzumati
    Jun 16 at 7:16
  • (2) should be 'I am not the one who writes the function'. Jun 16 at 7:35


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