warn sb.后是加 to do 还是加 doing 又有什么区别吗
问题描述：
warn sb.后是加 to do 还是加 doing 又有什么区别吗
答
warn sb not to do
warn sb of sth(doing sth)
答
应使用warn sb. to do something，warn sb doing sth.是错误的，但可以warn sb. against doing sth.
答
to do sth
warn sb of sth 告诫某人某事
warn sb (not ) to do sth 告诫某人（别） 做什么
warn sb against doing sth 告诫某人别做什么
warn sb against sb / sth 告诫某人提防某人,某物
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答
应该是加doing sth