Can I have some cakes这句话不属于病句。
不定代词some表示“一些”，用于肯定句，而不用于否定句、疑问句或条件句，但当说话者期望对方得到肯定的回答时，则在疑问句里也可以用some，如：
Could you bring us some Indian bread?
May I have some more coffee?
If you eat some cabbage, I will take you to the park.
Some doctors can tell you it’s poisonous.
Does she know some French?
Doesn’t she know some French?
不定代词some、any、no、every和body、one、thing可构成十二个复合不定代词，这十二个复合不定代词的特点是：修饰语无论长短，均要后置。如：
I got you something from my holiday.
There was something mysterious on the wall.
I have something for you.
When they came near, they saw something that had five legs.
Something wonderful will come out of the bottle.
On the table was something that Madame Curie had worked so hard to find—radium.
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