some 既然是做定语，就不算不定代词。不定代词后面是不跟名词的。举例：some boys are playing in the park. 主语是some boys ,算可数名词复数。some milk is needed now. 主语是some milk, 不可数名词，算单数。some is good, some is bad. 这里的some 算不定代词，单数。
