Barry wants to see an action movie.Barry Doesn't want to see an action movie为什么否定句want不用+s

问题描述:

Barry wants to see an action movie.
Barry Doesn't want to see an action movie
为什么否定句want不用+s

因为第三人称的变化已经在doesn't上体现了

因为前有助动词DOESN'T 第三人称的变化就变在助动词上了

因为doesn‘t已经表示第三人称单数了