问题描述：
英语疑问句 why not
why does the writer not understand the porter?
why doesn't the writer understand the porter?这两句有什么区别,语法都是正确的吗?
why does the writer not understand the porter?
why doesn't the writer understand the porter?这两句有什么区别,语法都是正确的吗?
问题解答：
我来补答展开全文阅读