Chinese phrase
我帮你买〜，可以吗？ wǒ bāng nǐ mǎi 〜 ké yǐ ma
Meaning
Can I buy ___ for you?
When to use it
A polite way to offer to buy something for another person. It asks for agreement before doing so and sounds helpful and considerate.
Example dialogue
我帮你买咖啡，可以吗？ wǒ bāng nǐ mǎi kā fēi ké yǐ ma
Can I buy coffee for you?
好啊，谢谢你，麻烦你了。 hǎo a xiè xiè nǐ má fán nǐ le
Sure, thanks. I appreciate it.