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  1. Boris Tatarenko's Avatar
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    #1

    modern astronomers are much better equipped.

    Modern astronomers are much better equipped. But some of the questions that they ask themselves (not change), like, for example, whether there has ever been life on Mars.

    The answer is "haven't changed", but I think "don't change" is also correct. Am I right?
    Last edited by Boris Tatarenko; 12-Mar-2014 at 12:19. Reason: typo "changed"
    Please, correct all my mistakes. I should know English perfectly and if you show me my mistakes I will achieve my dream a little bit faster. A lot of thanks.

    Not a teacher nor a native speaker.

  2. 5jj's Avatar
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    #2
    Both haven't changed and don't change are fine.

  3. MikeNewYork's Avatar
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    #3
    I prefer "haven't changed" in that sentence.

  4. Boris Tatarenko's Avatar
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    #4
    Quote Originally Posted by MikeNewYork View Post
    I prefer "haven't changed" in that sentence.
    Is there any reason?
    Please, correct all my mistakes. I should know English perfectly and if you show me my mistakes I will achieve my dream a little bit faster. A lot of thanks.

    Not a teacher nor a native speaker.

  5. MikeNewYork's Avatar
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    #5
    Yes, the statement refers to questions that have been around in the past and continue to the present. The questions did not arise in the present. They have been there.

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