Citation from Definition of "part" noun from the Oxford Advanced Learner's Dictionary:

We spent part of the time in the museum.

We spent a good part of the day rehearsing.


Are there some reasons why an article "a" is used in the second sentence but the first sentence? Or is it optional to use "a" for these sentences?

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I found several related posts, but I think they don't directly answer my question.

  • 2
    The reason is the presence of the adjective. Part of the day doesn't specify how big a part it was. A large part, a small part, a good (meaning large) part all require the indefinite article. We can also say the greater part, which imagines that the day (or whatever) is divided into two parts and this is the larger one. Commented May 9, 2021 at 8:17
  • @KateBunting Thank you for your reply. So can "little" be used like "little part of the day" since it can be used with uncountables?
    – catwith
    Commented May 10, 2021 at 2:11
  • 1
    When you say 'it can be used with uncountables', do you mean little in the sense of not much? When it describes a part it is an adjective like small, so it needs an article. Commented May 10, 2021 at 7:39


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