英语写作 | by和until的区别

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WRONG: Write the report until 5 pm.

RIGHT: Write the report by 5 pm.

Write the report until 5 pm means “Start writing the report now, continue writing it until 5 pm, then stop writing it regardless of whether it is finished or not.”
当你使用“until”意味着“从现在开始写报告,一直写,写到下午五点,然后不管你写没写完,都不能再写了”。

Write the report by 5 pm means “Make sure that at 5 pm the letter is written and finished”.
当你使用“by”就表示“确保一定要在下午五点前写完这封信”。

Use “by” when you refer to a deadline.
使用“by”,你指的是一个最后期限。

Use “until” when you refer to the period of time before a deadline.
使用“until”,你指的是在最后期限之前的一段时间。

Here’s a summary:
总结:

  1. I can do it by 5 pm.
    我能在下午五点前做完。
  2. I can do it until 5 pm.
    我会做到下午五点(不管有没有完成)。
  3. I can’t do it by 5 pm.
    下午五点前我做不完。
  4. I can’t do it until 5 pm.
    我要到下午五点才能开始做。

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