look down upon有被动语态么

look down upon有被动语态么 look down upon意义 look down upon look at、look for 和look after有被动语态么? 翻译look down和 upon burn down用作不及物动词短语时,有没有被动语态? close down有被动语态吗?举个例子, train有被动语态么? eat 有被动语态么 increase有被动语态么 look after的被动语态 look down upon和look down on的区别~ we shouldn't look down upon the disabled.he isn't reading a book now.的被动句 look down upon的反义词是什么? look down ,look down upon ,look upon三者有什么联系和不同 被动语态改为主动语态...有什么窍门么? send up 有被动语态么? happen to 有被动语态么