is this the reason 还原成陈述语序

is this the reason 还原成陈述语序 为什么what is the matter这句话是陈述语序? This is the reason ____I did it. The reason for this is obvious I don't know what is the time为什么这里的宾语从句不用陈述语序? Nobody knows _what is the matter with him.后边不是应该用陈述语序吗? 宾语从句的陈述语序Do you know the book is on the desk?Do you know the the reason for it is还是the reason for this is? 为什么This is the reason （that） he is late 连词成句 when,was,news,surprised,he,the,heard,Henry 是陈述语序 Is this the reason _____at the meeting for his carelessness The reason why I love this festival is that the