When the article "some" appears before a plural noun it functions like an indefinite article:
However, when "some" appears before a singular noun, it is being used as a partitive. This is to say that a part of something is indicated, or a partial (or indeterminate) quantity is referred to. It is often used after verbs of possession or consumption:
Note: After expressions of quantity, the partitive article is not used:
In negative expressions, the partitive article "some" generally becomes "any" (this change will also occur in negative interrogatives):
The word "any" is not strictly necessary in the negative,and it may often be omitted:
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