Some students can't work it out.为什么这里用some不是any

问题描述:

Some students can't work it out.
为什么这里用some不是any

any 用于问句
any student can work it out?

陈述句用some

some用于肯定句,student是可数的.但像Would you like some bread?这样的话是表达提建议的,用some.此题用some.
any用于否定句或疑问句.

这句话表示一些学生能算出,疑问句的时候用any.