问题描述: during my stay in usa,i visited many places.这句话里为什么用stay,如果用stayed可以吗? 1个回答 分类:英语 2014-10-28 问题解答: 我来补答 不可以 during one's stay in .在某人逗留.期间 这里stay 是n. 展开全文阅读