do you know what that means?do you know what does that means?

题目

do you know what that means?do you know what does that means?
请问这两句话哪个对 意思有什么不同

答案

Do you know what that means?正确
在Do you know / Can you tell me 这类起句的提问句型中,后面从句必须是陈述句语序.
Do you know...
What does that mean ...
都属于问句形式,不能串在一块儿,what/where/when/how/who 这些词后面的句子必须改变.
例如：
你可以告诉我吗 Can you tell me...
他是谁 Who is he?
你可以告诉我他是谁吗?Can you tell me who (he is)
如果仍不明白欢迎追问.