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A. Can I have more bags, please?

B. Can I have some more bags, please?

C. Can I have more ketchup, please?
D. Can I have some more ketchup, please?

1. What is the difference between the sentences in each pair above?
2. Which ones are grammatical?
3. Which is more natural in each pair?

By the way, I've given two pairs of examples, the first pair with the countable noun 'bags' and the second with the uncountable noun 'ketchup'. I wonder if the answer in each question above would differ taking into account the type of noun. Thank you in advance for your assistance.
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1. What is the difference between the sentences in each pair above?-- No difference in meaning. 'Some' is more natural, less formal.

2. Which ones are grammatical?-- All are fine.

3. Which is more natural in each pair?-- See #1

By the way, I've given two pairs of examples, the first pair with the countable noun 'bags' and the second with the uncountable noun 'ketchup'. I wonder if the answer in each question above would differ taking into account the type of noun. - No.
Comments  
Thank you for the answers. I now understand.