问题描述： She often works at night对 at night提问 1个回答 分类：英语 2014-10-05 问题解答： 我来补答 When does she often work?at night 意思是在晚上,是表示时间的词,因此用when提问.因为没有be动词,就需要加助动词do/does,因为主语是单三,所以加does 展开全文阅读
