英语中的问题英语中What do you like doing?中的doing为什么要加ing呢?

英语中的问题英语中What do you like doing?中的doing为什么要加ing呢? 英语 What do you like doing what are you doing do为什么加ing What are you doing为什么要加ing After doing your homework 中do为什么要加ing 英语中的sb,do,doing, 英语中的sb do doing 英语为什么要What are you doing?而不是What do you doing?我经常把are和do 弄混 What do yuo like doing英语作文 What were you doing at 7:30 last night? 请问do为什么加ing What do you like doing Don't let me catch you doing that again.do为什么加ing呢?能不能不加呢.