Do you know what is our professor's address.这句话对吗?为什么不是Do you know what our professor's address is.

do you know what--------(it)name is Do you know what this is? Do you know what the answer is? do you know what is my meaning? do YOU KNOW WHAT IS ufo? Do you know what it is? Do you know what is love? Do you know what is love? 应该是Do you know what is it 还是Do you know what it is what do you know Do you know what Do you know what? 应该是Do you know what does is mean.还是Do you know what it means. Do you know what time it is 还是is it? Do you know my heart?I think you do not know what is I want do you know what is my meaning?do you really know it? do you know what's the matter?还是do you know what the matter is?为什么?do you know what's wrong with that?what 是什么成分？主语？ it,what,know,is,do,you 连词成句