how tall is she 怎么回答

　　how tall is she和how tall she is区别：

　　前者是特殊疑问句，后者是名词性从句。

　　在特殊疑问句中，疑问词后面跟的是一般疑问句的语序，除了提问主语部分的疑问句外，如：

　　What's the problem?

　　Where are Robbie and Alexandra?

　　Why didn't they come?

　　在名词性从句中，特殊疑问词后面跟的就不是一般疑问句的语序了，而是陈述句的语序，如：

　　I wonder what the problem is.

　　I don't know where they are.

　　I don't understand why they didn't come.