Question

what's your doing?;

Answer 1

I am doing sth. 翻译：我在做某事。

“What are you doing?”是用来询问你现在正在干什么（英语语法：现在进行时）。一般回答用I am doing sth。

比如：What are you doing? 

I am watching TV./ I am reading a book./I am eating an egg/I am writing the homework/ I am playing the guitar/I am listening the music.

翻译：我在看电视/我在看书/我在吃鸡蛋/我在写作业/我在弹吉他/我在听音乐。

延伸

1、提问：What is he/she doing? 翻译：他/她在干什么？

回答：He/She is playing. 翻译：他/她在玩。

2、提问：What are they doing?

回答：They are chatting. 翻译：他们在聊天。