1.英語:他在做什麼What is he doing? I 是第一人稱用am。you 是第二人稱用are。 he/ she/ it都是第三人稱,全都用is。
所以是:
What am I doing?
What are you doing?
What is he/she/it doing?
另外所有的非人類的動物,物品之類的也都用is。
但是如果第三人稱是非複數,比如他們,她們,或一羣動物,就要用are。
所以是:
What are they doing?
What are those boys doing?
What are these dogs doing?