为什么要用do you know how he gets to school,不用 do you know how does he get to school.

为什么要用do you know how he gets to school,不用 do you know how does he get to school. how do you know How do you know? 为什么用How much do you know about her?而不用How many do you know about her? How many kind of noodles do you know,为什么要用kinds 这里为什么要有do呢?How do you know? 为什么不是Why do you know that,而是How do you know that How do I know you? 为什么spend在这里要用过去式?But do you know how the students in other countries spend their holidays? what's thing make you so happy?how do you know this?为什么一个要DO助动词,一个却不需要? Do you know how large the earth is?请问这里为什么要加is? do you know how mang there are colours of rainbow中为什么用there are I do not know ( )you feel中（）用what还是how,为什么 how many brothers do you have?为什么要用do? do you know how much i love how much do you know really about do you know how to write How many color do you know?