有关英语中从句的问题语法书上说当宾语从句引导一个特殊疑问句时,不论是连接代词还是连接副词,后面都是接一个陈述句.但是I

I know that boy who is playing basketball中的语序是陈述语序。在英语中,疑问词作主语、主语的定语时,陈述语序和疑问语序是一样的。比如：Whose bag is the biggest in your class?I don't know whose bag is the biggest in your class。顺便说一下,在这个句子中who is playing basketball引导的从句不是宾语从句,而是定语从句修饰前面的先行词that boy 。