合并句子题!can you tell me whose backpack is that?can you tell me?whose backpack is black?

题目

合并句子题!can you tell me whose backpack is that?can you tell me?whose backpack is black?
怎么分析出来的第一句是对表语提问,第二句是对主语的定语进行的提问?因为分析不好所以不会合并第一句.我知道宾语从句的从句得用陈述语序所以第二句从句的陈述语序是不变的,而我觉得第一句的陈述语序是that backpack is 所以做的不对?请大家从语法上帮我分析一下,正确的第一句是backpack that is

答案

合并句子题! can you tell me ?whose backpack is that? can you tell me?whose backpack is black?如果你要把这两个从句：whose backpach is that? 和 whose backpack is black? 合成Can you tell me? 这个主句的宾语的话,就是：1、Can you tell me whose backpack that is? 和2、 Can you tell me whose backpack is black ? 原因1,正如你所分析的那样.2,如果将that 放在 backpack 之前的话,它就作定语,不是表语.因此,在第二句中,black 作主语,whose作主句的宾语从句的引导词,同时又作backpack 的定语.整句还是陈述句语序.
不知我分析透了没有,愿与你再探讨.