问题描述: They have decided which hotel to stay at.这里为什么要加at,那什么不时候不加at 1个回答 分类:英语 2014-09-18 问题解答: 我来补答 They have decided which hotel to stay at.他们已经决定住哪家旅馆了.stay at a hotel,住在一家旅馆.stay是个不及物动词,如果没有介词的帮忙,后面是不能接地点的.如果后面是一个副词作地点状语的话,就不用介词at了.如stay there,住在那里. 展开全文阅读