I found someone online who can help me in English, and I will teach him Persian. He said to me:

Yes, I am a native speaker of (American) English and well educated in reading and writing. I would be happy to help proofread a paper for you.

He must be a native speaker, but are these natural sentences of a native and educated speaker? for example I doubt about the structure of the bold parts.

These are other messages from him:

I have a bachelor's degree in computer science. My job is improving online site search for The Home Depot, so I work on algorithms to understand language. I read papers, but I don't usually do research at my job, unless it is a small project to research how an algorithm performs.

  • 3
    As all of these sentences are grammatical, to answer the question in your title, we have to solely depend on assumptions. That would render your main question "primarily opinion-based". Besides, with the observation of this glimpse of their fluency, I don't see why it should be a problem if they're not a native speaker. – M.A.R. Jun 28 '15 at 15:47
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    The person you found is using English idiomatically. It is quite common for a speaker of American English to say "my job is {gerund} the .." rather than "my job is to {infinitive} the .....". My job is painting cars. My job is to paint cars. – Tᴚoɯɐuo Jun 28 '15 at 15:56
  • @M.A.Ramezani So, if there is no grammar error, or the sentences are understandable, then I can assume he is a native. I sent it here just to know all the sentences sound well. – Ahmad Jun 28 '15 at 15:57
  • I would say those sentences come from an educated speaker. You can definitely find much worse out there on the wild internet. I don't understand why those phrases seem odd to you considering that you list computer science in your bio. – shawnt00 Jul 10 '15 at 3:06

As a native speaker, I could easily write the same sentences.

There is no way to tell. There is nothing in those short extracts that would determine the nature of the writers english language background.

  • I agree. These aren't the way I would write all of these, but there is no indication that the speaker is not native. – rcook Dec 20 '16 at 3:05

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