为什么是Do you know what is the matter

为什么是Do you know what is the matter 为什么是Do you want to know what I do?而不是what am do? what do you know Do you know what Do you know what? Do you know what letter is a kind of drink?为什么是茶 do you know what kind of work ___ ____ do 为什么是 I could而不是 could I Then what is it used ,do you know?这里为什么是is it?而不是it is?是Then what is it used （for），do you know？这里为什么是is it？而不是it is？ what do you know是什么意思? Do you know ,what's - Then what is it used for,do you know?这里为什么是is it?而不是it is? Do you know what he_____(do) now? If you know what will you do Do you know what I like you do you know what you said what you name Do you know me do you know?what does mary like?合并为一句 do you knowdo you know?what does mary like?合并为一句do you know（ ）（ ）（ ）（ ）do you know（ ）（ ）（ ） Don't you know What I can do?的What I can do与句子What can I do?为什么是一种意思的两种表达方式?这中间该怎么区分,是语法还是什么?