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  1. Junior Member
    Student or Learner
    • Member Info
      • Native Language:
      • German
      • Home Country:
      • Germany
      • Current Location:
      • Germany

    • Join Date: Nov 2016
    • Posts: 84
    #1

    "by when" vs. " until when"

    Sentences with "by when":
    By when do I have to get there?
    By when do I have to have it memorized?
    By when do I have to enrol?
    By when do I have to let you know?
    By when do I have to generate this amount?
    By when do I have to submit the report?
    By when do I have to decide?
    And by when do I have to do it?
    By when do I have to leave Hong Kong?
    By when do I have to turn this in?

    Does "until when" also work:

    Until when do I have to get there?
    Until when do I have to have it memorized?
    Until when do I have to enrol?
    Until when do I have to let you know?
    Until when do I have to generate this amount?
    Until when do I have to submit the report?
    Until when do I have to decide?
    And until when do I have to do it?
    Until when do I have to leave Hong Kong?
    Until when do I have to turn this in?

    If there is any difference, please be so kind and explain this to me.
    Thanks for your help.

  2. VIP Member
    Interested in Language
    • Member Info
      • Native Language:
      • American English
      • Home Country:
      • United States
      • Current Location:
      • United States

    • Join Date: Dec 2015
    • Posts: 14,687
    #2

    Re: "by when" vs. " until when"

    Remove by from each sentence and they'll be correct and natural.

    Until doesn't work in any of the second set of sentences.
    I am not a teacher.

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