Answer and Explanation:
The general rule states that "some" must be used in affirmative sentences. However, it is correct to use it in a question such as "Would you like some water?" The reason for that is that this question is an offer. When you offer someone something, it is okay to use "some". Let's give some other examples:
- Would you like some cake?
- Do you want some sugar with your coffee?
Note that it is also okay to use "some" when you request or ask for something, even if it is a question. For example:
- Can I have some tea, please?