在英语语法中，”doing”文章通常用来描述正在进行的动作。当我们想要表达目前正在发生的行为或者动作时，可以使用这种形式。比如：
- She is doing her homework right now.
- They are doing a project for their science class.
此外，”doing”文章还可以用来描述规定时间内的反复行为或者常规活动，类似于习惯动作。也可以表示对未来的安排。例如：
- I usually go for a jog in the morning, but today I am not doing it.
- Are you doing anything special this weekend?
“doing”文章还可以用于一些固定搭配中，如下所示：
- He is doing his best to improve his English.
- Let’s stop doing the same mistakes over and over again.
