I don't know why she did 这句话对吗,不是在宾语从句中助动词do,did 之类的要去掉

I don't know why she did 这句话对吗,不是在宾语从句中助动词do,did 之类的要去掉 i don't know why did she do such a thing这句话的语法对吗,为什么 I don't know .Did Jack finish his homework?(改宾语从句） i don't know.did jack finish his homework?改成宾语从句 I don't know, how much did the book cost.改为宾语从句,谢了 i don't know why did she live there.这个句子正确吗?请分析 宾语从句问题i don't know who are you?这句话对吗.从句要用陈述句语序.但我发现有些不需要用陈述句 I don't know what to do中what to do是宾语从句吗? I don't believe you did.在这里did是助动词（表强调）还是动词? 在 I don't know what was the matter with you.中,句型不是宾语从句么?为什么不 I don’t know how to do it .中,how to do it是否为宾语从句,如果是,那宾语从句的主 五.合并句子．1.Why did he go to bed so early I don’t know.2.Do you