We use some in the affirmative and any in the negative and the interrogative. We also use some in requests.

Analysis of the sentence:

• The sentence explains the usage of 'some' and 'any' in English grammar.
• 'Some' is used in affirmative sentences and in requests.
• 'Any' is used in negative and interrogative sentences.

Explanation: This is a grammatical rule for using determiners 'some' and 'any'. It highlights the contexts in which each word is appropriate.