否定句：I don't have long hair. 一般疑问句：Do you have long hair? 再问： 什么情况下用does? 再答： 当主语是第三人称的时候 比如：She has long hair. 那么疑问句就是：Does she has long hair? 否定句就是：She does not have long hair. 再问： 否定句吧don't改成not可以吗？ 再答： don't = do not 可以的 再问： 还要加上do吗？ 再答： 当然要哟 ，记住 don't = do not 否定
