英语：他在做什么？用英语怎么说 What is he doing？I 是第一人称用am.you 是第二人称用are.he/she/it都是第三人称，全都用is.所以是：What am I doing？What are you doing？What is he/she/it doing？另外所有的非人类的动物，物品之类的也都用is.
他是干什么的.他的工作是什么.用英语怎么说， what does he do？what's he？what's his job？初中就掌握这三个就可以了？
她在干什么？英语怎么说 What is she doing
