问题描述: be busy at和别的介词的区别老师说有be busy at. 1个回答 分类:英语 2014-12-14 问题解答: 我来补答 确实有 be busy at... ...忙于做某事:be busy at (with,about,over,doing) sth 都可以. 如:妈妈整天忙于做家务.可以说:My mum is busy at housework all day.这个句子中at可以用括号里的词替换. 展开全文阅读